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问题 单项选择题

对腹部闭合性损伤伴休克，腹穿抽出粪样液体者应

A．立即手术治疗
B．观察腹部情况12小时后，再考虑是否行手术治疗
C．胃肠减压，输液，抗炎治疗
D．积极治疗休克，如休克仍不好转，则在继续抗休克的同时进行手术探查
E．需待休克好转后方能手术

答案

参考答案：D

选择题

— _________ rapid progress they have made!

— Right. And it is true ______the students from the poor areas.  [      ]

A. How; for    

B. What; of    

C. How; of    

D. What a; of
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单项选择题

The great advance (91) rocket theory 40 years ago showed that liquid-fuel rockets were far (92) in every respect to the skyrocket with its weak solid fuel, the only kind of rocket then known. (93) , during the last decade, large solid-fuel rockets with (94) fuels about as powerful as liquid fuels have (95) their appearance, and it is a favorite layperson’s question to (96) which one is "better". The question is meaningless. (97) might as well ask whether a gasoline or a diesel engine is "better". It all (98) on the purpose. A liquid-fuel rocket is complicated, (99) has the advantage that it can be controlled beautifully. The burning of the rocket engine can be stopped completely; it can be reignited when (100) . (101) , the thrust can be made to vary by adjusting the speed of the fuel pumps. A solid-fuel rocket, on the other hand, is rather (102) in construction, (103) hard to build when a really (104) size is desired. But once you have a solid-fuel rocket, it is ready for action (105) very short notice. A liquid-fuel rocket has to be fueled first and cannot be (106) readiness for very long after it has been fueled. (107) , once a solid-fuel rocket has been ignited, it will keep burning. It cannot be stopped and reignited (108) desired (it could conceivably be stopped and reignited after a pre-calculated time of burning has elapsed, and its thrust cannot be varied. Because a solid-fuel rocket can be kept ready for a long time, most military missiles (109) solid fuels, but human-piloted spaceflight needs the fine adjustments that can (110) be provided by liquid fuels.

A．On the contrary

B．Meanwhile

C．Rather

D．However
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