问题 多项选择题

在X线的产生中,必须具备的条件是()

A.电子源

B.高真空

C.阳极旋转

D.电子的高速运动

E.电子的骤然减速

答案

参考答案:A, B, C, D

单项选择题
完形填空

First aid means the aid or the help that can be given to an injured person first, that is, before any other help arrives. Nowadays there is usually a telephone not far away and the first things we should do, if a serious accident happens, is_____________________________. Sometimes quick action by us may save someone’s life.

Shock. People often suffer from shock after receiving an injury, sometimes even when the injure is a small one. The face turns gray, and the skin becomes damp and cold. They breathe quickly. They should be kept warm. Cover them with a blanket and give them a warm drink.

Broken bones. Do not move the patient. Send for an ambulance at once.

Bleeding. A little bleeding doesn’t harm. It washes dirt from the wound. But if the bleeding continues, try to stop it by placing a clean cloth firmly over the wound until the bleeding stops or helps arrive.

Poison. A person who has taken poison should be taken to a hospital at once. With some poisons, sleeping pills, for example, it is a good thing to make the patient throw up by pressing your fingers down his throat.

Remember: When an accident happens, telephone for an ambulance at once. Keep the injured person warm and quiet. Give him plenty of air. Do not let other people crowd around him.

小题1:What’s the best title for the passage? (within 2 words)

___________________________________________________                        

小题2: What’s the symptom when someone goes into shock? (within 20 words)

________________________________________________________                   

小题3:Please fill in the blank in the first paragraph with proper words or phrases to complete the sentence.(within 10 words)

________________________________________________________                   

小题4: What’s the author’s purpose of writing the passage? (within 15 words)

________________________________________________________                   

小题5:Translate the underlined sentence in the last but one paragraph into Chinese.