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问题 单项选择题

LNG储罐内的液化天然气自然蒸发成气态的天然气为BOG，其特点不正确的是（）

A.低温

B.持续不断

C.密度比常温空气重

D.以上都不正确

答案

参考答案：D

改错题
短文改错。
      此题要求改正所给短文中的错误。对标有题号的每一行作出判断：
     如有错误（每行只有一个错误），则按下列情况改正。
     此行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。
     此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
     此行错一个词： 在错的词下划一横线，在该行右边横线上写出改正后的词。
     注意：原行没有错的不要改。
An American and a Frenchman decided to cross the sea
between France and England in the balloon in 1784. High
over the water, they discover a hole in the balloon. The
hole became bigger and bigger. The air keeps the
balloon up was escaping quickly and the balloon is
coming up. The two men threw all their equipment into 
the water to make the balloon light. It started to rise
higher again. So it was still too close to the water.
Finally, the men threw away most of his clothes to
save themselves. The crowd waiting for to greet them in
England was very surprised see this when the balloon 
landed in front of them. 		1. _____
2. _____
3. _____
4. _____
5. _____                     
6. _____
7. _____
8. _____
9. _____
10. _____
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单项选择题 A1/A2型题

体检发现上肢血压升高，下肢血压不高或降低，形成反常的上、下肢血压差别，临床诊断应考虑（）

A.先天性多囊肾

B.急性肾小球肾炎

C.动脉粥样硬化性肾动脉狭窄

D.先天性主动脉缩窄

E.先天性肾动脉狭窄
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