2008年8月1日开通的京津城际铁路最高运行速度可以达到（）。A.250km/h B

When you have a cold, a headache, a cough, or you can’ go to sleep, who are you going to ask for help ? Perhaps your answer is to go to the doctor for help, or to get some medicine from the drugstore. Another idea is to ask your grandparents to get some simple ways to solve these problems. Here are some good ways to feel better from some old people.

If you have a cold, you should eat hot chicken soup. Some people drink hot water, juice or milk.

If you have a headache, you may put some ice or a cold cloth(布) on your head, or cool your face with cold water. It’s also a good idea to put your hands into hot water for several minutes. Also, you shouldn’t read anything or watch TV.

If you have a cough, you may drink hot water or eat some honey.

If you can’t get to sleep, you may drink a glass of warm milk. It’s also a good idea to take a bath.

小题1: If you have a cold, you can eat hot chicken soup, drink ________, juice or milk.

A. hot water                   B. cold water                 C. wine

小题2: If you have a headache, you can leave your hands in hot water for _______ .

A. several hours                B. a few minutes            

C. a little minutes

小题3:If you have a cough, it’s a good idea for you to drink hot water or eat ________ .

A. some vegetables             B. some fruit                  C. some honey

小题4: If you can’t get to sleep, _________ can help you.

A. taking a warm bath           B. running                    C. drinking water

小题5:What is the best title of the article ?

A. How to keep healthy ?         B. You should keep healthy.

C. Simple ways for health problems.

概念结构设计阶段得到的结果是

A．数据字典描述的数据需求

B．E-R图表示的概念模型

C．某个DBMS所支持的数据模型

D．包括存储结构和存取方法的物理结构

细胞分化是指同源细胞逐渐发育为具备以下特征的另一类细胞的过程（）

A.形态结构稳定，生理功能和生化特征不稳定

B.形态结构不稳定，生理功能和生化特征稳定

C.形态结构和生理功能稳定，生化特征不稳定

D.形态结构、生理功能和生化特征均不稳定

E.形态结构、生理功能和生化特征均稳定

天燃气

埋入式盐浴炉因电极不占炉膛容积，可提高装炉量，电耗可显著下降。一般埋入式盐浴炉可节电（）。

A．5－10%；

B．10－15%；

C．15－20%；

D．20－30%