(2014? Yixing City Simulation) Building ecological civilization is the only way to realize a beautiful China, and reducing environmental pollution is the duty of every Chinese citizen. since 2

(1) "Smog" mainly harms the human respiratory system. When air enters the lungs, it must pass through the nasal cavity, pharynx, larynx, trachea, and bronchi. However, PM2.5 particles are tiny and difficult to block. After being inhaled into the human body, they will directly enter the bronchial tubes, interfere with the gas exchange in the lungs, and cause asthma and bronchitis. and cardiovascular diseases. Toxic and harmful substances are transferred and accumulated along the food chain. The higher the trophic level, the higher the content of toxic substances. That is, harmful substances continue to accumulate in organisms through the food chain, so that their concentrations gradually increase as the level of consumers increases. This phenomenon is called bioconcentration. Humans are at the end of the food chain, and the concentration of harmful substances in their bodies should be the highest.

(2) ①The power of breathing mainly comes from the contraction and relaxation of the intercostal muscles and diaphragm.

② When a person is in a calm state, life activities slow down, the energy consumed is reduced, and the oxygen required is reduced. Therefore, the breathing frequency is lower and the breathing depth is smaller; during strenuous exercise, due to the consumption of exercise, More energy requires more oxygen, so the frequency of breathing will increase and the depth of breathing will also increase. It can be seen from the figure that the breathing frequency of curve A is lower and the breathing depth is smaller, so it represents the breathing situation in a calm state; the breathing frequency of curve B is higher and the breathing depth is larger, so it represents the breathing situation during strenuous exercise. ．

③ From the analysis and the figure, it can be seen that the breathing frequency of curve B is accelerated and the breathing depth is deepened.

(3) PM2.5 particles are small and difficult to block. After being inhaled into the human body, they will directly enter the bronchus, interfere with the gas exchange in the lungs, and cause diseases including asthma, bronchitis, and cardiovascular disease. ． Therefore, when "smog" strikes, doors and windows should be closed indoors, and masks should be worn when going out. Susceptible groups such as patients should go out as little as possible and conduct as few outdoor activities as possible. C error.

(4) Measures that can be implemented to control "smog" include: landscaping, more tree planting, protecting vegetation, reducing vehicle exhaust emissions, etc. (As long as it is reasonable)

(5) Environmental protection slogans include: Develop clean energy, be healthy, environmental protection is a guarantee, protect the ecological environment, build a beautiful home, protect the environment is to protect productivity, Promote green living, implement clean energy, etc.

. (As long as it is reasonable)

So the answer is: (1) Respiration; food chain;

(2) ①Contraction and relaxation of respiratory muscles;

② Calm; exercise;

③ The respiratory rate is accelerated and the breathing depth is deepened;

(3) C;

(4) Carry out more tree planting, etc.;

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(5) Promote green life and implement clean energy, etc.