题干

下面列出一些医疗器械的名称和这些器械运用的物理现象.请将相应的字母填写在运用这种现象的医疗器械后面的空格上.

X光机____

②紫外线灯____

③理疗医用“神灯”照射伤口,可使伤口愈合得较好.这里的“神灯”是利用了____

A.紫外线的波长很短          B.紫外线具有很强的荧光作用;

C.紫外线具有杀菌消毒作用;   D.X射线的很强的贯穿力;

E.红外线具有显著的热作用.

上一题 下一题 0.0难度 选择题 更新时间:2019-12-23 12:01:31

答案(点此获取答案解析)

D,C,E

同类题5

任务型阅读

    Ebola is a dangerous virus that can cause people to get very sick and even die. The virus is causing the biggest problems in western Africa, where it has spread quickly.____But it can get worse and cause life-threatening symptoms (症状), such as bleeding and trouble breathing.

____

    Ebola does not spread like colds or the flu because it does not float through the air. Ebola also doesn't spread through food or water, like some other viruses. Instead, Ebola spreads when someone touches the body fluids(液体) of a sick person.

____

    An outbreak is when many people are getting sick with the same illness around the same time. You may have heard of a flu outbreak, which is when lots of people get sick from the same types of flu virus. When an outbreak happens because of a virus, more people could get sick because there is a lot of that virus around.

    Where did Ebola come from?

Scientists aren't sure how the first person gets Ebola at the start. ____ Tropical animals in Africa believed to carry the virus include great apes, chimpanzees, gorillas, monkeys, fruit bats, porcupines, and forest antelopes.

    What do kids need to do about Ebola?

    Ebola is making many people sick in Africa, but no matter where you live, it's always a good idea to wash your hands well and often. ____

A. What is an outbreak?

B. How do people catch Ebola?

C. Why do I need to wash my hands?

D. It's very important that infected people get treatment right away.

E. Ebola symptoms can start with fever and headache, kind of like the flu.

F. But they think that people may pick up the virus by touching or eating infected animals.

G. Keeping hands clean can help protect you from common illnesses like colds and the flu.