倒凹区在支托同侧下方的基牙，有较大的组织倒凹而无法放置杆形卡环时，采用的卡环形式是（

It is a cold and dry winter morning. When you wake up, you feel that your throat hurts. You begin to sneeze and later you may cough. You must have a cold! Wait a moment. Could it just be a common cold or the flu (流感) that’s been going around?

A cold gives you a runny nose and cough. But it’s usually easy to deal with. Some take medicine while others drink herbal tea or chicken soup. Usually you feel better after a week.

On the other hand, the flu can be much more dangerous. It usually gives you fever. Sometimes it can cause death. According to an American magazine, the worst flu killed about 50 million people from 1918 to 1919.

Don’t worry. If you get a flu vaccine (疫苗), it can stop you from getting the virus (病毒). Flu vaccines work by giving the body a small amount of flu viruses. This causes your body to develop antibodies (抗体). So next time you get the flu, the antibodies should help you.

The flu virus changes every few years. Therefore, there are so many types of flu, such as H1N1 and H5N1. The antibodies for one type of flu can’t help us against all types of flu. That’s why we need to get the vaccine every year.

However, good health habits may also help stop you developing a cold or flu. Washing your hands often helps stop you from getting viruses. It is also important to get regular exercise and eat healthy food. All these can help you strengthen your immune system (增强免疫系统).

小题1:If you have a common cold, usually you’ll feel better after ________.

A．a week

B．two weeks

C．ten days

D．twenty days小题2:According to the passage, which is TRUE of the flu?

A．It first happened in 1919.

B．It usually doesn’t give you fever.

C．It is easy to deal with.

D．It can kill people sometimes.小题3:If you get a flu vaccine, ________.

A．it can’t stop you from getting the flu virus

B．it won’t cause your body to develop antibodies

C．your body will develop antibodies

D．your body will get a large amount of flu viruses小题4:We need to get a flu vaccine every year because ________.

A．we probably have a cold in winter

B．the flu virus changes every few years

C．the flu is very dangerous

D．you don’t need to take any medicine after that小题5:The following ways can help stop the flu EXCEPT ________.

A．staying indoors

B．getting regular exercise

C．eating healthy food

D．washing our hands often

应用程序设计完成后，应将程序保存，保存的过程是( )。

A．只保存窗体文件即可

B．只保存工程文件即可

C．先保存工程文件，之后还要保存窗体文件

D．先保存窗体文件(或标准模块文件)，之后还要保存工程文件

简述包装设计的作用和领域？

参加同一救助作业的各救助方的救助报酬，应( )。

A．按各方救助程度确定

B．由各方协商确定

C．按各方参与顺序确定

D．按各方救助成本确定

梅奥根据霍桑实验的成果，认为企业存在着（）

A.团队

B.群体

C.正式组织

D.非正式组织