以下药物可发生的反应是雌激素与硫酸乙醇共热（）。 A．硫色素反应 B．麦芽酚反应 C

以下不属于系统误差的是（）。

A、读数不当造成的误差

B、安装位置不当产生的误差

B、看错刻度线造成的误差

D、环境条件变化产生的误差

用机器将回收的废“可乐”饮料瓶粉碎成的细小碎片(该饮料瓶是由化学名称为聚对苯二甲酸乙二酯的热塑性塑料制成的)

阅读理解

     Almost every family in America or England buys at least one copy of a newspaper every day. Some

people buy as many as two or three different papers.

     Why do people read newspapers?

     Newspapers supply us with news about events in our hometowns, in our country and in other parts

of the world. Today we can read about important things that took place in foreign countries on the same

day they happened, even in countries far away. But hundreds of years ago, news of things took months

or even years to travel from one country to another. In those times, news was often passed from one

person to another andnever entirely true. Newspapers today supply us with more than just what

happened in our country or in other countries.  If we want to know what the weather will be like, we

can read the weather reports. If we want to find out what films are being shown, or what plays or

concerts we can go to we can look in the newspapers.

     In many countries people put notices in newspapers if they are trying to get a job, hunting for a house

or rooms that they can rent, or even when looking for a person who is lost.               

1. This article tells us           .

A. most people read newspapers

B. all people read newspapers

C. every person in America or England reads newspapers

D. all families read newspapers

2. Newspapers supply us with _      .

A. only home news

B. only world news

C. home news and world news

D. important things

3. Which is NOT true according to the passage?

A. The habit of reading newspapers is found among most people.

B. Newspapers not only supply us with news from all over the world but also give us a lot of useful information.

C. Hundreds of years ago news was not wholly true because it was told in spoken words.

D. If you have no place to live in, you can put notice in a newspaper and then you will certainly get a room to live in.

4. Things such as          can be found in newspapers.

A. weather reports and film or concert guides

B. requirements for a job or a house

C. information about a lost person

D. all of the above

带电作业工具设计原则是什么？

“包装种类”栏应填( )。

A．纸箱

B．木箱

C．件

D．其他