下列数值与阿伏加德罗常数相等的是（） A．0.5 mol Fe在反应中转移的电子

阅读理解。

     In Africa I heard a story about a giraffe that did not believe himself.

     The giraffe's mother had left him when he was a few days old because she couldn't feed

him. For three years he lived in the warden's 看守人) house and played with the children. Then he grew

too large for the house.

     The family decided that he should return to his fellows. They took him to join a herd of wild giraffes.

     One look was enough for the giraffe's small brain. He could not believe that such extraordinary(特别的) animals existed. Or that he was one of them ! He turned and ran away.

    The family took him back several times. In the end they gave up. Now their giraffe lives by himself near

the warden's house.

1. The baby giraffe was probably separated from his mother because _______.

A. the warden took him away

B. his mother couldn't feed him

C. the warden's children took him

D. he ran away

2. After three years the giraffe became_______.

A. too wild to play with the children

B. too large to play with the children

C. popular with other giraffes

D. too big to live in the house

3. The warden's family tried to_______.

A. Let the giraffe do what he liked

B. find the giraffe's mother

C. tell the giraffe what he was

D. take the giraffe to join the herd of wild giraffes .

4. When he met the herd, the giraffe could not understand _______.

A. how animals like giraffes could exist

B. why he wouldn't join the other giraffes

C. that he was really a giraffe, too

D. both A and C

5. The story suggests that _______.

A. most mother giraffes leave their babies

B. giraffes are too large to be pets forever

C. giraffes are not very smart

D. this giraffe was unusually tall

我国规定硝酸盐与亚硝酸盐用于肉类罐头不得超过（）。

A.0.5g／kg

B.0.05g／kg

C.5mg／kg

D.0.5mg／kg

E.0.05mg／kg

采用预裂爆破法施工隧道时，其分区起爆顺序为( )。

A．底板眼→辅助眼→掏槽眼→周边眼

B．辅助眼→掏槽眼→周边眼→底板眼

C．掏槽眼→周边眼→底板眼→辅助眼

D．周边眼→掏槽眼→辅助眼→底板眼

第三部分 阅读理解(共20小题；每小题2分，满分40分)

阅读下列短文，从每题所给的四个选项A、B、C和D中，选出最佳选项。

Tears are nature’s way of making us feel more comfortable. When our eyes are made uncomfortable by some small pieces of pollution, or when we are cutting onions, or when we are exhausted and “red-eyes” from over work and late hours, tears form in our eyes to clean and refresh them.

Tears are also a sign of strong emotion. We cry when we are sad and we cry when we are happy.

And tears seem to be uniquely human. We know that animals also experience emotion--fear, pleasure, loneliness, but they do not shed (流) tears.

Biologically speaking, tears are actually drops of saline fluid, which is a little bit salty, produced by a gland (腺) in the body. Because salt is an important component, tears may actually constitute the most conclusive evidence that the human animal is the end product of a long evolutionary process that began in the sea.

And it is clear that, in addition to the emotional benefits, the shedding of tears has a specific biological function as well. Through tears, we can eliminate from our body certain chemicals which build up in response to stress and create a chemical imbalance in the body. Crying actually makes us feel better by correcting that imbalance and making us feel good again. And thus the emotional and the biological functions of tears merge (合并) into one and make us even more “human” than we would otherwise be.

1. According to the passage, human beings may have originated in

A. the sea         B. the salt              C. chemicals            D. animals

2. Which of the following is NOT a function of tears?

A. Biological.      B. Emotional.           C. Political.             D. Chemical.

3 According to the article, which of the following is unique to humans?

A. The feeling of loneliness.                 B. The state of feeling good.

C. The ability to shed tears.                D. The feeling of fear.

4. The underlined word "eliminate" probably means

A. add             B. produce             C. replace               D. remove

项目评估研究的重点是( )。

A．可行性研究的真实性和可靠性
B．投资机会研究的真实性和可靠性
C．初步可行性研究的真实性和可靠性
D．资产评估的真空性和可靠性