计算题：已知正弦交流电的电压U=311sin（628t＋45°）伏，求（1）电压的最

阅读理解。

     To save time, many Americans often buy fast food. On holidays, families enjoy nice meals at home. For

example, on Thanksgiving Day, the fourth Thursday in November, families come together for a dinner. Usually

they enjoy a big turkey and pumpkin pies (南瓜馅饼).

     The United States is famous for its fast food, such as hamburgers, sandwiches, pizzas, and ice creams.

People can easily find fast food restaurants, such as McDonald's (麦当劳) and Kentucky Fried Chicken (肯德基),in most of the big cities in the world.

     There are many foreign restaurants in the USA. Chinese, Italian and French cooking are the most popular.

People can buy foreign foods in these restaurants. These years, many people have paid more and more attention

to (越来越关心) their health. They come to eat foods with little fat. Many of them are also worried because

some people like to put something in the foods. This can make the foods good-looking, but it is not good for

man's health.

1. What do the Americans often buy to save time?

A. clothes

B. cars

C. fast food

D. nice meal

2. When is Thanksgiving Day?

A. December 25th.

B. April 1st.

C. Tuesday.

D. The fourth Tuesday in November.

3. Is now McDonald's the famous fast food in the United States?

A. Yes, It is.

B. No, it isn't.

C. Yes, it did.

D. No, it didn't.

4.What do many people pay more attention to now?

A. restaurant

B. fast food

C. McDonald's

D. their health

5. What do you think we should eat?

A. food with a lot of fat

B. food with little fat

C. good-looking food

D. fried food

下列关于建立、维持和发展人际关系的方法，错误的是( )。

A．直言不讳的指出对方的缺点

B．牢记对方的姓名

C．尽量迎合对方的兴趣

D．真诚的赞扬和欣赏对方

在传播材料预试验中，听取有关领导对该材料的修改意见属于（）

A.可读性试验

B.重点人群调查

C.把关人调查

D.问卷调查

E.剧场测试

简述肝性脑病的药物治疗。

血浆葡萄糖定量方法中，所测反应物不包括（）

A.己糖激酶法--ATP

B.O－T法--Schiff碱

C.葡萄糖脱氢酶法--NADH

D.葡萄糖氧化酶法--H₂O₂

E.己糖激酶法--NADPH