教研活动计划的常见格式（）。A、文件式； B、条文式； C、表格式； D、记录式。

阅读理解。

     Do you know you could get sick just by walking past a building? The bacteria (细菌) that cause

Legionnaire's disease grow very fast in large modern buildings. They are carried by air through the buildings

and outside. Legionnaire's disease is only one of the illnesses that are caused by "sick buildings".

     Some buildings can make you ill because their heating and air-conditioning are controlled. Air from

outside cannot get in through the closed windows. This indoor air pollution is a growing problem.

     Legionnaire's disease, which can kill, is probably the most serious result of sick buildings, but other

unpleasant illnesses can appear. People who work in some buildings suffer from tiredness, feeling sick and

headaches. Their offices look bright and clean, but invisible (无形的) and dangerous bacteria are in the air

around them.

     There is an answer to the problem. The air-conditioning and heating can be tested for bacteria. Once the

tests are complete, the sick building can be cured (治愈). This is expensive to do, but the results are good.

"The people in the buildings no longer get sick, and everybody is happier.

1. "Sick buildings" means _________.

A. very old buildings

B. buildings that are going to fall down

C. buildings for sick people

D. buildings that make people feel sick

2. The indoor air pollution is caused by _________.

A. Legionnaire's disease

B. the air from outside

C. lack  of flesh air

D. unpleasant illnesses

3. We can tell that a building might be "sick" when _________.

A. the windows are all closed

B. bacteria can be seen in the air

C. the air-conditioning and heating don't work well

D. people in it have got different kinds of disease

4. Which of the following is TRUE?

A. Legionnaire's disease is only one of the results of "sick buildings".

B. There is less and less indoor air pollution.

C. The bacteria are. not dangerous if the offices look bright and clean.

D. If the tests for bacteria are expensive, the results are good.

5. The underlined (下画线的) sentence in the last paragraph means

" As soon as the tests are complete, _________".

A. bacteria will disappear by themselves

B. Legionnaire's disease won't kill people

C. people in the building will no longer get sick

D. something can be done to cure the sick building

关于体液的描述错误的是（）。

A.主要成分是水和电解质

B.分为细胞内液和细胞外液两部分

C.小儿的脂肪较少，体液量所占体重的比例较高

D.14岁以上儿童的体液量所占体重的比例和成人相仿

E.成年女性体液量比成年男性多

某机电公司经销的某种商品。其单位商品变动费率为0.8，固定成本分摊为 7.5万元，该种商品的销售单价为1250元/台。该种商品的保本销售量为( )。

A．200台

B．250台

C．300台

D．350台

( )决定何时进行备份、备份收集何种数据，以及出现故障时进行恢复的方式。

乙烯产品要求乙烷含量越低越好。