Science comprehensive ability test?
Note: 1. This paper is divided into two parts: "test paper" and "answer sheet". The first volume (multiple choice questions) in the test paper should be on the machine-readable card, and all other test questions should be in the area specified in the "answer sheet";
Before answering the questions, candidates must scribble their names, test numbers, test subjects, etc. Mark "answer sheet" and "machine-readable card" on the "machine-readable card" and "answer sheet" after the exam? Take it back together;
3. The full mark of this volume is 300, and the examination time is 150 minutes.
Possible relative atomic mass: h-1n-140-16cu-64.
Volume one? Multiple choice questions (*** 126)
First, multiple-choice questions (this question includes 13 small questions, and only one option in each small question meets the meaning of the question. 6 points for each small question)
1.？ The following groups of structures or substances are absolutely free of ribose.
A. Nuclei and ribosomes B. Chromosomes and enzymes
C. the core and plasmid of chloroplast and mitochondrial d. T2 phage
2.？ The graph A on the right shows the variation curve of DNA content on each chromosome during animal cell division, and the graph B shows a period during cell division. The following statement is incorrect.
A.？ Gene mutation may occur in the A-B fragment of Figure A.
B.？ Figure A M: Homologous chromosomes in a cell combine into a tetrad.
C.？ Figure b corresponds to paragraph D-E of figure a.
D.？ The result of this cell division can only produce one germ cell.
3.？ The following statements about bioengineering are correct.
A.？ In genetic engineering, marker genes are usually used to screen recipient cells that successfully express target genes.
B.？ In plant tissue culture, cell dedifferentiation, gene mutation, gene recombination and chromosome variation may occur in the process of root tip cells forming callus.
C.？ The characteristics of cloned animals cultivated by somatic cell nuclear transfer are not exactly the same as those of animals that provide nuclei.
D.？ Penicillin is an important primary metabolite in the growth and metabolism of Penicillium, which can be extracted from culture solution by distillation, extraction and ion exchange.
4.？ The curves in A, B and C on the right represent a life phenomenon: ① the influence of auxin concentration on the growth rate of roots and stems; (2) The relationship between the temperature change of warm-blooded animals and warm-blooded animals and the ambient temperature; ③ Relationship between light intensity and photosynthetic rate. Coordinates a, b and c represent a variable in life activities: I? Release amount (absorption amount) of O2; II ambient temperature; Three. Growth rate. Below. List the life phenomena represented by A, B and C and the correct combination of variables represented by A, B and C as follows.
A.？ A is ①a is Ⅲ; B is 3 b is I C is 2? C is II
B.？ A is ① iii; B is ③b is II; ? C is 2 c is I.
C.？ A is ②a is Ⅱ; B is 3 B or III? C is 1? C is I
D.？ A is 3 a is me; B is ①b is IIII? C is 2? C is II
5.？ The promotion of stem elongation by gibberellin is mainly related to the ductility of cell wall. Some people have done exploratory experiments on the effects of CaCl2 _ 2 _ 2 and gibberellin on the growth rate of hypocotyl of a plant seed, and the results are shown in the right picture. According to the chart analysis, the relevant conclusions that cannot be drawn are as follows.
A.？ A certain concentration of calcium chloride solution can inhibit the extension of cell wall.
B.？ A certain concentration of gibberellin solution can promote the extension of cell wall.
56. The promotion of gibberellin on stem elongation may be related to its ability to scavenge Ca2+ in cell wall.
Gibberellin is mainly synthesized in immature seeds, young roots and buds.
A. Low-carbon economy based on energy conservation and emission reduction is a strategic measure to maintain social sustainable development. The following practices violate the low-carbon economy.
A. Using solar energy to produce hydrogen B. Closing small thermal power enterprises
C. replace the bus with a family car. Restrict the use of plastic products
A.NA stands for avo Gadereau constant. The following statement is correct.
A. at room temperature, lL? The number of NO3- ions in O.lmol/L's NH4NO3 solution is 0. 1NA.
A. Under standard conditions, the number of molecules contained in 2.24LH20 is equal to 0. 1NA.
A. 1molCl2 The number of transferred electrons participating in the reaction must be 2NA.
A.3.4gNH3 contains an N-H bond of 0.2NA.
A. the following statement is correct.
A.HF、HCK？ HBr。 ? The thermal stability and reducibility of HI decrease in turn.
When iron meets cold concentrated nitric acid, the surface of iron is passivated, which can protect its interior from corrosion.
A. 1.0xl0-3mol/L？ Hydrochloric acid pH=3.0，？ 1.0xl0^nol/L？ Hydrochloric acid pH=8.0
A. Oil and protein are both macromolecular compounds that can undergo hydrolysis reaction.
A. The following ionic equation is correct.
A. adding iron powder into dilute sulfuric acid:
A. remove the scale from the water bottle with vinegar:?
A. add enough dilute nitric acid to ferrous hydroxide:?
A copper sulfate solution absorbs H2S gas:?
A. A monobasic strong acid solution ① and a monobasic weak acid solution ② with the same volume and pH react with sufficient zinc powder respectively. The following diagram about the change of hydrogen volume (v) with time (t) is correct.
A. plastic food boxes, water cups, etc. Polystyrene is usually used in daily life, and their structures are simplified as follows:
According to the knowledge learned, the following statement is incorrect.
A. polystyrene belongs to aromatic hydrocarbon B. polystyrene is a natural polymer compound.
C. polystyrene can be prepared from styrene by polymerization. D the molecular formula of polystyrene monomer is C8H8.
D. The following inference is correct
58.Na2O，？ Na2O2 and CO2 have the same composition elements and the same reaction products.
No.59.02 is an acidic oxide, which can react with NaOH solution.
c？ CO, NO and NO2 are all air pollution gases, which can exist stably in the air.
A. The newly prepared chlorine water is acidic, and a small amount of purple litmus test solution is dripped, and the solution is red after full oscillation.
A. There are four kinds of mixed solutions, which are formed by mixing two kinds of O.lmol/L: ① equal volume solutions? Use HCl②? With NaOH③? With NaCl④? With what? The following items are in the correct order.
A.？ pH:②& gt； ④& gt； ③& gt； ①b。 ? c？ :②の③の④& gt； ①
C. in solution? :①& gt； ③& gt； ②& gt； 4d。 ? c？ ①& gt； ④& gt； ③〉②
Second, multiple-choice questions (this question contains 8 small questions. Among the four options given in each small question, some have only one correct option, while others have multiple correct options. 6 points for all, 3 points for those who choose right but not all, and 0 point for those who choose wrong)
A. the following statement is correct.
A. Under the condition of complete weightlessness, the gas in the closed container has no force on the wall top.
A an ideal gas with a fixed mass may have the same volume after isothermal compression.
When the temperature rises, the internal energy of an ideal gas with a certain quality will inevitably increase.
A. When the container filled with gas decelerates at a uniform speed, the average kinetic energy of gas molecules in the container decreases accordingly.
A.— Simple harmonic shear wave propagates at the speed of 4m/S; The c axis propagates in the positive direction. If the waveform is known as shown in the figure, then
B the period of this wave is1s.
When t=0, the particle at x = 0 moves forward to the Y axis.
C.？ When t=l/4s, the velocity of the particle at x = 0 is 0.
D.？ The particle with x = 0 has the maximum velocity at t = 1/4 seconds.
70. What is the distance between the synchronous satellite and the center of the earth? The running speed is acceleration, and the centripetal acceleration of the object rotating with the earth at the equator is O2; The speed of the first universe is v2, and the radius of the earth is V2, so the following ratio is correct.
Canadian Broadcasting Corporation? d？
7 1. As shown in the figure, place an object on the horizontal ground. When an object is pulled by a force F at an angle of 60 degrees with the horizontal direction, the object moves in a straight line at a uniform speed; When the force F2 pushes the block at an angle of 30 from the horizontal, it still moves in a straight line at a uniform speed. If F 1 and F2 are equal in size, the dynamic friction coefficient between the block and the ground is
A.？ BC? . ? d？
72. The horizontal thrust F 1 and F2 act on two objects A and B with equal mass on the horizontal plane respectively. After a period of action, the thrust is removed and the object will continue to move for a period of time and then stop. T-v diagrams of two objects are shown in the figure. , then
The impulse of A.f 1 is greater than that of F2.
The impulse of b. f 1 is less than F2.
C. the friction of two objects is equal.
D. the friction between two objects is different.
73. Suppose the potential of space electrostatic field? Use; C changes as shown in the figure. According to the information in the figure, it can be determined that the following statement is correct.
A. The direction of field strength at each point in space is perpendicular to the% axis.
B. The charge moves from 0 to & along the axis. In this process, it must not be affected by electric field force.
C. positively charged along a; In the process of moving the shaft from dog to 々, the electric field force does work and the electric potential energy decreases.
D in the process of negative charge moving along the x-axis, the electric field force does negative work and the electric potential energy increases.
74. The efficiency of the power supply T7 is defined as the ratio of the power consumed by the external circuit to the total power of the power supply. The experimental curve obtained in the experiment of measuring the electromotive force and internal resistance of power supply is shown in the figure. /is the terminal voltage of the circuit, J is the main current, and A and 6 are two points on the diagram. What is the efficiency of the power supply in the corresponding state? 、? Can you see it from the picture? 、? The values of are respectively
A.？ B? c？ d？
2 1? The rated power of an automobile engine is P 1, and the resistance F is constant when driving on a horizontal road. The car starts to move in a straight line on the horizontal road with the maximum speed of V. The image of the output power of the car engine changing with time is shown in the figure.
Answer? Start the car to accelerate evenly, the speed reaches V at t 1, and then do uniform linear motion.
B.？ At the beginning, the traction of the car gradually increases, and at t 1, the traction is equal to the resistance.
C.？ At first, the car will move in a straight line with uniform acceleration. After t 1, it will make a linear motion with decreasing acceleration. When the speed reaches V, it will move in a straight line at a uniform speed.
D.？ At the beginning, the traction of the car is constant, and the traction and resistance are equal at t 1
Volume two? Non-multiple choice questions (* * 174)
22.？ (18 points) (1) There is a thin-walled tube with a square cross section, and the outer side length/is measured with vernier calipers divided into 20 grids, as shown in Figure A; When the pipe wall thickness is measured with a screw micrometer, as shown in Figure B, the measured outer length of the pipe is L = _ _ _ _ _ _ cm and the measured wall thickness is d = _ _ _ _ _ _ mm..
(2)? The experimental device of "exploring the relationship between acceleration and object mass and force" is shown in figure C. Balancing the trolley and the desktop; ? In the process of rubbing, a paper tape as shown in Figure D is punched out. The timer starts counting from a clear point at an interval of 0.02 seconds, and takes a counting point every five points to measure the distance between adjacent counting points. Then the acceleration of the car is a = _ _ _ _ _ _ m/s2. (The result retains two significant figures).
After rebalancing the friction, put all five identical weights on the trolley, hang the weight plate, and then take them off the trolley every time?
Add a weight to the scale and measure the acceleration of the car. The experimental data of the acceleration a of the trolley and the total gravity f of the weights in the weight plate are as follows:
Please make a diagram according to the experimental data.
The a-F diagram based on the provided experimental data does not pass through the origin. The main reason is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
(3) The following figure shows the experimental circuit of "Drawing equipotential lines on a plane in an electric field by tracer method". The equipment given in the figure is as follows:
Power supply e (electromotive force 12V, excluding internal resistance); Board? (Whiteboard, carbon paper and conductive paper are stacked on the board from bottom to top); Two metal strips a,? b？ (placed in parallel on conductive paper and in good contact with conductive paper, used as an electrode); Sliding rheostat (its total resistance is less than the resistance of conductive paper between two parallel electrodes); Dc voltmeter v? (The measuring range is 6V, and the internal resistance is very large. The negative terminal is connected to 5 poles, and the positive terminal is connected to the probe p); Switch S.
Now, draw the equipotential line in the electric field between two parallel metal bars 4 and B with the instrument in the figure. The voltage between 4 and 5 is required to be 6V.
(1) wiring in the chimney to complete the experimental circuit diagram; .
The following are the main experimental steps, please fill in the missing contents.
a.？ Connect the experimental circuit as shown in the figure;
b.？ ________________________________________________________;
C: close switch s and contact probe p with a.
d.？ ________________________________________________________;
e.？ Mark the positions of A and B on the white paper by means of probe stamp, draw a line segment to connect the AB pole, select five points with approximately equal spacing on the connecting line as reference points, and stamp the white paper with the probe;
f.？ Touch the probe with a reference point, record the voltmeter reading, move the probe on conductive paper, and then find a point with the same voltmeter reading as the recorded value, which is the equipotential point of this reference point, and print the position of this point on white paper with the probe. Find other equipotential points of this reference point in the same way.
g.？ Repeat step f to find the equipotential points of other reference points, take out white paper and draw equipotential lines.
23.？ (16) inspired by birds in the air, human beings invented the airplane. It is known that the lift obtained by birds gliding in the air can be expressed as? Where s is the wing area, v is the bird's speed, and k is the proportional system. There is a bird with a mass of 120g and a wing area of Sl, and the minimum speed of its horizontal uniform gliding is12m/s. Assuming that the upward lift obtained by the plane is the same as that obtained by the bird when flying, there is an airplane with a mass of 3200kg on the runway.
24.？ (18 minute) On a smooth and insulated horizontal plane, two balls A and A (both of which can be regarded as particles) are located on the X-axis, with ball A charged and ball B uncharged. At the beginning, the ball B is still, and the field strength is? At the edge of the horizontal uniform electric field of N/C (as shown in Figure A), the ball A collides with the ball B after 2 seconds from the origin, and moves in the electric field as a whole after the collision. Part of the relationship between kinetic energy and coordinates of systems A and B is shown in Figure B, then:
( 1)? What was the speed of hitting the ball before; .
(2)? First,? B What are the masses of the two balls?
(3)? Please point out what electrical characteristics the A ball has? What is the charge of the four balls?
25.(20 minutes) In the device shown in the figure, the electromotive force of the power supply is E, regardless of the internal resistance, the fixed value group is R 1, and the total resistance of the sliding rheostat is R2. The parallel plate capacitor placed in vacuum is placed horizontally with a distance d between the plates. When the slider P of the sliding rheostat is at the midpoint, the oil drop A in the capacitor is just at rest.
( 1)? Find the voltage between the two plates of the capacitor at this time;
(2)? Find the electrical properties of oil droplets and the ratio of charge q carried by oil droplets to mass m;
(3)? Now the slider P of the sliding rheostat quickly slides upward from the midpoint to a certain position, so that the charge on the capacitor changes Q 1 and the oil droplets begin to move. After time t, the slider quickly slides down from this position to another position, which changes the charge on the capacitor again? Q2, after another 2t, the oil drops returned to the original static position. Assuming that the oil droplets do not contact the electrode plate during the movement, the time taken by the sliding rheostat to slide and the time taken by the capacitor to charge and discharge are ignored. What is the ratio of Q 1 to Q2?
26.( 17 points) J, L, M, R and T are short-period main group elements with increasing atomic numbers, and their relative positions in the periodic table are as follows; The absolute value of the lowest negative valence of element J is equal to the outermost electron number of its atom; M is the most abundant metal element in the crust.
The schematic diagram of the ionic structure of (1)T is _ _ _ _ _; The element r is located in the _ _ _ _ family of the periodic table of elements.
(2) The molecule of the compound composed of J and hydrogen has four atoms, and its structural formula is _ _ _ _ _ _.
(3) The chemical equation of the edge-melting reaction between M and NaOH is _ _ _ _ _ _.
(4) The simplest aqueous solution of gaseous hydride A of L is alkaline. . ? .
① In the microelectronics industry, the aqueous solution of A can be used as an etchant? Scavengers, reaction products do not pollute the environment, its chemical equation is _ _ _ _ _.
(2) Under certain conditions, A decomposes (? ) After reaching equilibrium, only change the reaction condition X in the table below. The correct test for the increase of Y with X in this equilibrium system is _ _ _ _ _ _ _ _? (Optional serial number).
Option a b c d
X temperature. Temperature plus the amount of H2, and the amount of A.
With the increase of the amount of Y A, the equilibrium shifts to the direction of producing A, the conversion rate of A increases, and the total amount of product substances increases.
(3) The ionic equation of the reaction between the compound formed by M and T and the simplest aqueous solution of gaseous hydride L is _ _ _ _ _ _.
(5) 0.2 mol of liquid compound Jr 2 0.2 J and R are completely combusted in O2 to produce two gaseous oxides. At 298K, the exothermic rate is 2 15kJ. The thermochemical equation of this reaction is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
27.( 10) A, B, C, D, E, F and G in the following figure are all organic substances, in which A is ortho-disubstituted benzene and B satisfies? The color reaction occurs in the solution, and the following reactions can occur between them:
Answer the questions according to the picture above:
The chemical name of (1)D is _ _ _ _ _ _ _ _.
(2) The short structure of A is: _ _ _ _ _ _ _ _ _ _ _; The reaction type of reaction ④ is _ _ _ _ _ _ _ _.
(3) The chemical equation of reaction ② is: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _; The chemical reaction equation of reaction ③ is _ _ _ _ _ _ _ _ _ _ _ _.
(4) The structure of the polyaddition product of G is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
28? (17) in order to prove the reducibility of CO, a chemical research group first consulted relevant materials and got the following information: ①? ;
② Both carbon monoxide and H2 can react with copper oxide under heating conditions;
③CO is highly toxic and can burn in the air.
Based on the above information and related knowledge, they designed an experimental device as shown in the figure.
Try to answer the following questions:
C.？ The ionic equation of the reaction in device A is _ _ _ _ _ _ _ _.
CI。 ? The most suitable reagent in device B. is _ _ _ _ _ _ _ _; The reason why device C must be used to absorb water vapor in gas is _ _ _ _ _.
CII。 ? When the experiment is carried out according to the device as shown in the figure, the first operation that should be carried out is _ _ _ _ _ _ _ _, and the air in the whole device should be exhausted, so the necessity of exhausting the air in the device is _ _ _ _ _ _ _ _ _ _; ? ; _。
CIII。 ? According to the _ _ _ _ _ phenomenon in this experiment, it can be proved that CO is reducible, and the chemical equation of the reaction is _ _ _ _ _ _ _ _.
Civilization? If you want to confirm the reducibility of CO according to the turbidity of limewater in equipment F, you should connect the equipment in the right picture between the equipment in the above picture _ _ _ _ and _ _ _ _? (Fill in serial number).
29.？ (16 minute) In the device shown in the figure, three beakers, A, B and C, are placed in turn respectively? Solution, is it enough? Solutions and? what's up The solution and the electrode are graphite electrodes.
D. turn on the power. After a period of time, the concentration of K2SO4 in C was 10.47%, and the mass of C electrode in B increased. Answer the question accordingly:
(1) The N terminal of the power supply is _ _ _ _ _ _ _ _.
② The electrode reaction on electrode B is _ _ _ _ _ _ _ _.
③ The volume of gas generated on electrode B under standard conditions:? _______。
(4) The mass change of electrode C is _ _ _ _ _ _ g..
⑤ Whether the pH of each solution has changed before and after electrolysis, and briefly describe the reasons:
A solution of acid and alkali _ _ _ _ _ _; The reason is _ _ _ _.
Is solution B acidic or alkaline _ _ _ _? ; The reason is _ _ _ _.
Solution C is acidic and alkaline _ _ _ _ _ _ _ _; The reason is _ _ _ _.
E. If all copper is precipitated during freezing electrolysis, can electrolysis continue at this time? Why _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
30.？ (20 points) Answer the following questions I and II. ? 、 ? '
I Next, Figure A and Figure B are schematic diagrams of chloroplast structure and photosynthesis process respectively. Please look at the picture and answer (fill in the serial number in [] and fill in the text):? .
73. In Figure A, the pigments that can absorb light energy are distributed in []? _ _ _ _ _, which is [] in Figure B? The location where the _ _ _ _ process takes place.
74. If green plants lack mineral elements _ _ _ _, it will directly affect the synthesis of chlorophyll in the body. The content of this element in fallen leaves is lower than that in normal leaves of plants, and the reason is _ _ _ _
75. In general, if enough corn is provided? ,? After fixation, the first product formed is _ _ _ _ _ _. After a period of time, the cross section of its leaves was stained with iodine solution, and it was observed under the microscope that _ _ _ _ _ _ cells were dyed blue.
76. Under suitable light conditions, the highest phosphorus content in chloroplasts of mesophyll cells is (? )。
A. adventitia b, inner membrane c particles d matrix
77. During the experiment under certain lighting conditions, it was detected that fresh leaves did not exchange gas with the outside world. Please explain the reason.
Two. In order to study the relationship between athletes' exercise ability and glucose intake, the researchers asked cyclists to carry out intensive training for five consecutive days. After consuming muscle glycogen as much as possible, the following experiments were done under the same environmental conditions Z. Please analyze and answer:
Group observation time, exercise intensity to maintain exercise time
High sugar diet group. Try pedaling for 50.2-80.2 minutes for 3 consecutive days.
The low-sugar diet group tried pedaling for 3 1.8-5 1.4 min for three consecutive days.
A. the conclusion of the study is _ _ _ _ _. The reason is that this diet improves the muscle glycogen reserve of athletes and ensures the supply of _ _ _ _ _ _ _ _ during exercise.
B. In addition to increasing the utilization rate of sugar, the consumption of _ _ _ _ _ is also significantly higher than usual. After exercise, the output of urea also increases accordingly. Therefore, athletes should not only supplement sugar, but also supplement _ _ _ _ in time.
C. scientific experiments have proved that the ATP content in human skeletal muscle cells is only enough to supply energy within 3 seconds during strenuous exercise. Please draw a curve of the relative ATP content in muscle cells changing with time in the process of sprinting.
D research shows that many patients with myasthenia gravis are infected by virus, and the body produces antibodies, which can not only bind to the virus, but also interact with Ach? (acetylcholine) receptor nodulation, blocking excitation conduction, leading to muscle weakness. Immunologically speaking, this kind of myasthenia gravis belongs to a _ _ _ _ disease.
3 1.？ (22 points) Answer the following questions I and II.
1. A research study group in a senior high school conducted a genetic survey on human eyes and facial features, and the results are shown in the following table.
Parent type group 1: both parents have double eyelids group 2: one parent
Double eyelids, a single eyelid Group III: Both parents are single eyelids.
Statistics of offspring types: double eyelids 186 1530.
Single eyelid 52 139 78
Please analyze and answer according to the above table:
(1) According to which group of surveys, what kind of eyelids can judge the dominant character of eyes and face?
D. If the alleles controlling eye-face traits are A and A, what are the mating modes of eye-face inheritance?
D. in the investigation, I accidentally found that someone has a double eyelid in one eye and a single eyelid in the other. Please explain it with the knowledge of genetics.
D The right picture shows the genetic pedigree of the eyes and face of the Xiaohua family (individual 5). The genotypes of their parents (individual 1 and 2) are _ _ _ _ _ _ respectively. It is speculated that the probability that Xiaohua's brother (No.4 individual) and sister-in-law (No.3 individual) have a single eyelid is _ _ _ _ _.
Two. In order to determine the location of the second stage of cellular aerobic respiratory cyanosis, a high school research and study group conducted the following research. It is speculated that the second stage of aerobic respiration only occurs in mitochondria and cannot be carried out in cytoplasmic matrix. The experimental process is as follows:
The experimental results show that CO2 is detected in tubes 1 and 2. (inconsistent with the predicted results). Please answer:
D. analyze the reasons why the experimental results are inconsistent with expectations and the improvement measures.
D. Experimental step ① Liver tissue is usually dispersed into hepatocytes by _ _ _ _ _ _ _ _ enzyme.
D. Experimental Step ③ The reason why mitochondria must be obtained without further centrifugation is because they think that mitochondria must be preserved in _ _ _ _ to complete the corresponding functions.
D the experimental principle on which experimental step ⑥ is based is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
D. After analysis and appropriate modification of individual steps of the experiment, the experimental results meet the expectations after re-experiment. Finally, the teacher put forward a new question: "Is the amount of CO2 dissolved in the air in the human sample large enough during the experiment, and does the detected reagent detect CO2?" ? In order to eliminate the experimental error caused by this interference factor, how did you solve it? "What do you think of the improvement measures?