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第二部分 阅读判断 (第l6~22题,每题l分,共7分)
下面的短文后列出了7个句子,请根据短文的内容对每个句子做出剡断:如果该句提供的是正确信息,请选择A;如果该句提供的是错误信息,请选择B;如果该句的信息文中没有提及,请选择C。
Tiny Invaders
The human body is truly amazing. It allows us to sense the world around us, to do work and have fun, and to move from place to place. In fact, the human body does its work so well that most people dont think about it very much -- until they get sick.
The germs(致病菌)that make people sick are everywhere. You cant see them, but theyre there. Theyre sitting on your desk. Theyre hiding on your computers keyboard. Theyre even in the air that you are breathing. There are two types of germs: viruses and bacteria(细菌).Viruses are germs that can only live inside animals or plants. Viruses cause illnesses such as flu and measles(麻疹).Bacteria are tiny creatures. Some bacteria are good. They can help your stomach break down food. Other bacteria arent so good. They can-make you sick. Bacteria can cause sore throats(喉痛)and ear infections.
How can you stop these tiny invaders from making you sick? Your skin is the first defense against germs. You can prevent some illnesses simply by washing, with soap and water. But germs can still enter the body through small cuts in the skin or through the mouth, eyes, and nose.
Once germs are inside your body, your immune(免疫的)system tries to protect you. It looks for and destroys germs. How does it do that? Special cells patrol your body. Some of these cells actually eat germs! Other cells make antibodies. An antibody sticks to a germ. There is a different antibody for each kind of germ. Some antibodies keep germs from making you sick. Others help your body find and kill germs. After a germ is destroyed, the antibodies stay in your body. They protect you if the same kind of germ comes back. That way you will not get the same illness twice.
You can keep your body healthy by eating a nutritious(有营养的)diet to make your immune system strong. You can also help your immune system fight germs by getting vaccinated(接种).Vaccines are medicines. They contain germs that have been killed or weakened. The dead germs cant make you sick. Instead, they cause your body to make antibodies. If the same germ ever shows up again, then your antibodies attack it.
16. Viruses can only live inside people or animals.
A.Right B.Wrong C.Not mentioned
17. All bacteria cause illnesses.
A.Right B.Wrong C.Not mentioned
18. Washing your skin can prevent some illnesses.
A.Right B.Wrong C.Not mentioned
19. Germs can enter the body through the eyes.
A.Right B.Wrong C.Not mentioned
20. The heart contains the bodys strongest muscle.
A.Right B.Wrong C.Not mentioned
21. After they kill germs, antibodies stay in the body.
A.Right B.Wrong C.Not mentioned
22. Vaccines can make you sick.
A.Right B.Wrong C.Not mentioned
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