水利水电施工企业应明确危险源的各级监管责任人和监管要求，严格落实（）措施。 A.分级

阅读理解。

     Mr and Mrs Green were going on their vacation with their children, and they had to arrive at the airport

before 11: 40 the next morning. "It takes us thirty minutes to get there in a car," Mr Green said, "so we have

to get ready before eleven o'clock. Don't be late."

     It was ten fifty in the morning. Mr Green and the children were busy doing things. But Mrs Green wasn't.

She sat in a chair in the garden and enjoyed the good weather.

     Mr Green and the children were surprised, but Mrs Green said, "Don't worry! Before I went bed last night,

I made all our clocks and watches twenty minutes ahead (提前). Now we can get to the airport early."

1. Why did the Green family have to be ready before eleven o'clock?

A. They were going to a party.

B. They had to go to the airport by bus.

C. They had to arrive at the airport at 11: 40.

2. How long does it take the family to the airport by car?

A. Twenty minutes.

B. Thirty minutes.

C. Forty minutes.

3. The father and children were _____ when they saw Mrs Green sitting in the garden.

A. sad

B. happy

C. surprised

4. Why did Mrs Green sit in the garden?

A She wanted to stay at home.

B. She didn't like to do anything at home.

C. She made all the clocks and watches ahead and they wouldn't be late.

3. What time was it when Mr Green and the children were busy doing things?

A. 10: 30.

B. 10: 50.

C. 11: 00.

掌颌反射

女性，68岁。慢性咳喘、咳痰近20年，近3年来症状加重，登二楼困难。有高血压病，服药控制较稳定。心电图示左心室肥大。昨傍晚无明确诱因突感胸闷、气急渐渐加重，不能平卧，彻夜未眠，今晨前来急诊。体检：端坐呼吸，紫绀。血压18/12kPa。气管位置无明显偏移。两肺叩诊过清音，呼吸音普遍降低，伴哮鸣音。心界叩不出，心音遥远。

本病例最可能的诊断结果是（）

A.左侧自发性气胸

B.急性肺栓塞

C.急性左心衰竭

D.急性心肌梗死

E.哮喘急性发作

患者女。持续剧烈腹痛一天，经检查诊断为急性腹膜炎。该患者的体征不包括（）

A.腹部压痛

B.腹式呼吸减弱

C.腹部肌紧张

D.腹部反跳痛

E.腹部揉面感

铁延伸率比灰铁（）。

A、低

B、一样

C、高

D、高2倍