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问题 单项选择题

引起脊柱骨折和脊髓损伤的常见外因不包括

A．交通事故

B．运动损伤

C．高处坠落

D．动静脉畸形

E．刀伤和枪伤

答案

参考答案：D

单项选择题

E


Last year, Shanghai-born Charles K. Kao and two North American scientists got the 2009 Nobel Prize(诺贝尔奖) in Physics together. Their work made the Internet come into a new age.
Kao, 77, was born in Shanghai in 1933. He is famous for finding out how to transmit (传输)light signals(信号) over long ways through glass fibers (玻璃纤维) as thin as a human hair. His work makes the Internet information transmit faster around the world. Kao was vice chancellor(副校长) of the Chinese University of Hong Kong from 1987 to 1996. He doesn’t work, and lives in Hong Kong now.
The Chinese people were pleased to learn the good news. "The people of Hong Kong and I send our congratulations to Kao on receiving the prize... Kao is also a true gentleman. We are greatly proud to have such an excellent person in Hong Kong. "Zeng Yinquan once said.
Willard Boyle, a Canadian American, and George Smith of the United States got the other half of the prize.

How many scientists got the 2009 Nobel Prize in Physics together ( )

A．One.

B．Two.

C．Three.

D．Four
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单项选择题

下列对通风方式的选择的叙述，正确的是（）。

A.设计局部排风和全面排风时，宜优先考虑采用局部排风

B.当自然通风不能满足卫生、环保和生产工艺要求时，宜采用全面排风

C.因全面通风的风量大，室内换气效果好，宜优先选用

D.因局部排风的所需风量小，效果好，宜优先选用
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