硝化甘油类炸药

一个体积是12厘米³铁球和一个15厘米³的铝球分别浸没在两个同样的盛满水的正方体量杯中．浸没______球的量杯中的水溢出的多．

结核病的免疫反应中起主要作用的细胞为（）

A.T细胞

B.B细胞

C.NK细胞

D.巨噬细胞

E.中性粒细胞

阅读理解。

     A simple piece of clothesline hangs between some environmentally friendly Americans and their neighbors.

     On one side stand those who see clothes dryers (干衣机) as a waste of energy and a major polluter of the

environment. As a result, they are turning to clotheslines as part of the "what-I-can do environmentalism (环境

保护主义)."

     On the other side are people who are against drying clothes outside, arguing that clotheslines are unpleasant

to look at. They have persuaded Homeowners Associations (HOAs) access the U.S. to ban outdoor clotheslines,

because clothesline drying also tends to lower home value in the neighborhood. This had led to a Right-to-Dry

Movement that is calling for laws to be passed to protect people's right to use clotheslines.

     So far, only three states have laws to protect clothesline. Right-to-Dry supporters argue that there should

be move.

     Matt Reck, 37, is the kind of eco-conscious (有生态意识的) person who feeds his trees with bathwater

and reuses water drops from his air conditioners to water plants. His family also uses a clothesline. But on July

9, 2007, the HOA in Wake Forest, North Carolina, told him that a dissatisfied neighlzir had telephoned them

about him clothesline. The Recks paid no attention to the warming and still dried their clothes on a line in the

yard. "Many people e say they are environmentally friendly but they don't take matters in their own hands,"

says Reck. The local HOA has decided not to take any action, unless more neighbors come to them.

     North Carolina lawmakers are saying that banning clotheslines is not the right thing to do. But HOAs and

housing businesses believe that clothesline drying reminds people of poor neighborhoods. They worry that if

buyers think their future neighbors can't even afford dryers, housing prices will fall.

     Environmentalists say such worries are not necessary, and in view of global warming, that idea needs to

change. As they say, "The clothesline is beautiful. Hanging clothes outside should be encouraged. We all have

to do at least something to slow down the process of global warming."

1. One of the reasons why supporters of clothes dryers are trying to ham clothesline drying is that _____.

A. clothes dryers are more efficient

B. clothesline drying reduces home value

C. clothes dryers are energy-saving

D. clothesline drying is not allowed in most U.S. states

2. Which of the following best describes Matt Reck?

A. He is a kind-hearted man.

B. He is an impolite man.

C. He is and experienced gardener.

D. He is a man of social responsibility.

3. Which of the following best describes Matt Reck?

A. He is a kind-hearted man.

B. He is an impolite man.

C. He is and experienced gardener.

D. He is a man of social responsibility.

4. What is mainly discussed in the text?

A. Clothesline drying: a way to save energy and money.

B. Clothesline drying: a lost art rediscovered.

C. Opposite opinions on clothesline drying.

D. Different varieties of clotheslines.

胸中郁闷不舒，时而发出长叹，称为

A．气粗
B．气微
C．少气
D．太息
E．喘

通过细胞内受体调节的是

A．Camp
B．肾上腺素
C．雌激素
D．cGMP