将工作现场打扫得干干净净属于6S中的（）范畴。

阅读理解。

     Mr Brown was an old man. He lived in a small village with high mountains all around it. He had never

been to a city before.

     Last summer his son came back, and took him to the city. He stayed there for about two months. When

he came back, his wife asked him, "Do you like living in the city? Did you have a good time?"

     "No, I don't like living in the city because the buildings are too tall. And the noise is too loud. The bed is

too soft. And they never have meals outside the house," answered Mr brown. "I'm very angry because the

people in the city aren't kind to the animals."

     "How do you know this?" asked his wife.

     "One Sunday morning Jack, our son took me to a place. There are a lot of animals in that place-tigers,

elephants, lions and monkeys. But they are shut (关) in the cages. The place is the prison (监狱) of the

animals." Answered Mr Brown..

1. Mr and Mrs Brown were ______.[ ]

A. doctors

B. teachers

C. zookeepers

D. farmers

2. When Mr Brown saw the animals were shut in the cages he felt ______.[ ]

A. satisfied (满意的)

B. angry

C. happy

D. surprised

3. He didn't like ______. [ ]

A. the mountains

B. the animals in the cages

C. the city

D. his village.

4. The animals in Mr Brown's village ______. [ ]

A. are free

B. are in the cages

C. are sent to the city

D. are in prison

5. Mr Brown did not know the place with a lot of animals was a ______. [ ]

A. park

B. garden

C. village

D. zoo

研究化学结构与毒性效应之间关系的目的是（）

A.寻找其规律，有助于通过比较预测，开发高效低毒的新化合物

B.从分子水平上推测新化学物的毒作用机制

C.预测新化学物的毒性效应

D.预测新化学物的安全接触限量

E.以上都不是

白卡纸(380mm×240mm140g/m2)

肾绞痛发作时，首选的治疗方法是（）。

A.饮水、补液

B.解痉止痛

C.碱化尿液

D.中药排石

E.抗感染

天然气的燃烧热值