Healthy Xinwei visual live playback

(1) Long-term close work, such as reading, writing, watching TV and playing video games. , resulting in the convex lens is too large, curvature is too large, can not be restored to its original state; In severe cases, the anterior and posterior diameter of the eyeball is too long, so that the object image formed by the light reflected by the distant object falls in front of the retina, and the distant object cannot be seen clearly, resulting in myopia, which needs to be corrected by wearing a concave lens.

(2) When you are sick, you should use drugs reasonably under the guidance of a doctor. Even over-the-counter drugs should not be used casually. It is best to consult a professional doctor and prescribe the right medicine. Antibiotics should not be abused.

(3) The organs that make up the respiratory system are shown in the figure: The respiratory system consists of respiratory tract and lungs.

Among them, the nasal cavity, pharynx, larynx, trachea and bronchus are the channels for gas to enter and leave the lungs, which are called respiratory tract, and have the functions of cleaning, moistening and warming the inhaled air.

(4) Avian influenza is an acute infectious disease caused by avian influenza virus. Vaccination can produce immunity and effectively prevent infectious diseases. After being injected into human body, it will not make people sick, but it can stimulate immune cells to produce corresponding antibodies. The injected vaccine is effective only for H5 subtype avian influenza, but not for other types of avian influenza viruses, and its effect is targeted and specific, belonging to specific immunity. It can be seen that C is correct.

(5) The material describes in detail the significance of voluntary blood donation. I am a citizen of school age in People's Republic of China (PRC), and I donated blood four times without compensation. I think people who donate blood in moderation for a long time have significantly higher fresh blood cell content in their bodies than those who don't donate blood, and they are more energetic and healthier.

So the answer is: (1) b;

(2) no;

(3) respiratory tract;

(4)C；

(5) I think that people who donate blood in moderation for a long time have significantly higher fresh blood cell content than those who don't donate blood, and they are more energetic and healthier.