根据《电力建设安全工作规程第2部分：电力线路》（DL5009.2-2013）7.1.

阅读理解。

      Mr Smith was in trouble those days. He drove a car for Mr Black, a rich businessman. He worked hard

and the shopkeeper liked him. But he couldn't work when he drank too much. And once he almost fell into

the river when he drove along the bridge. Mr Black became angry and was going to send him away. He had

a big family and was afraid of it and promised (许诺) he would stop drinking at once. The man told him to

wait to be dealt with (处置).

     One Monday morning Mr Smith came into the office with two badly burned ears.

     "What happened to your ears?" asked Mr Black.

     "Well," said the man. "I went to watch a football match yesterday while my wife was ironing (熨) clothes.

She had put the iron (熨斗) near the telephone before she went to cook supper. Our team lost the game and

I felt sorry for it. As soon as I went in the sitting-room, the phone rang and I answered the iron!"

     "And what happened to the other ear?"

     "When I put the iron down on the table, the telephone rang again!"

1.            , so he almost drove the car into the river. [ ]

A. Mr Smith was not careful

B. Mr Smith drank too much

C. Mr Smith forgot they were on the bridge

D. Mr Smith couldn't work in the evening

2. Mr Smtih went to watch the football match on            . [ ]

A. Monday

B. Tuesday

C. Saturday

D. Sunday

3. We can guess            . [ ]

A. Mr Smtih drank much after the match

B. Mr Smith was angry with his team

C. Mr Smith didn't drink those days

D. Mr Smith watched the match at the office

4. The             badly burned Mr Smith's ears. [ ]

A. telephone

B. drinking

C. iron

D. irons

5. What would happen to Mr Simth? [ ]

A. He would go on driving for Mr Black.

B. He would join his football team.

C. He would never watch any matches.

D. Mr Smith would send him away.

预防职业中毒的中心环节是

A．消除毒物

B．加强通风

C．隔离生产

D．降低毒物浓度

E．采取综合措施

我国气候暖和湿润，物产丰富，被称之“鱼米之乡”的地区是[ ]

A．东北平原

B．华北平原

C．长江中下游平原

D．四川盆地

在“用单摆测定重力加速度”的实验中，测得单摆摆角小于5°，完成n全振动的时间为t，用毫米刻度尺测得摆线长为L，用螺旋测微器测得摆球直径为d.

(1)用上述物理量的符号写出重力加速度的一般表达式g＝________.

(2)从图可知，摆球直径d的读数为________ mm.

(3)实验中有个同学发现他测得重力加速度的值偏大，其原因可能是_______

A．悬点未固定紧，振动中出现松动，使摆线增长了

B．单摆所用摆球质量太大

C．把n次全振动时间误当成(n＋1)次全振动时间

D．以摆线长作为摆长来计算

一般而言，在国际贸易业务中，一份合同应该包括品名、品质、数量、包装、价格、交货、支付、（）、检验、索赔、仲裁、不可抗力等十二项条款

A.单位

B.风险

C.保险

D.容量