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陈先生，21岁。20分钟前被人用刀刺伤右胸。检查发现其右胸第4肋间腋中线处有3cm长的伤口，可从伤口处听到空气出入的“嘶”“嘶”声，并见有血液流出，呼吸急促。

病人最可能是（）

A.右侧闭合性血气胸

B.右侧开放性血气胸

C.连枷胸

D.肋骨骨折

E.心包填塞

答案

参考答案：B

单项选择题

Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation.

About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag.

21（）

A.forced 

B.warned 

C.swept 

D.reminded
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单项选择题

MIPS常用来描述计算机的运算速度，其含义是( )。

A．每秒钟处理百万个字符

B．每分钟处理百万十字符

C．每秒钟执行百万条指令

D．每分钟执行百万条指令
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