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问题 选择题

阅读下面语段，回答问题：

人才成长的综合效应论阐明，创造性实践在个体人才成长过程中起决定性作用， 但并不是任何创造实践都能成功。只有有效的创造实践才能成功。

这段话主要支持了这样一种观点，即（　　　）。

A．个体只有在有效的创造实践中，才能成长为真正的人才

B．人才成长是由多种因素综合决定的

C．人人都应该参加创造实践活动

D．综合效应理论是现代人才综合理论

答案

答案：A

无

单项选择题 A1/A2型题

初次装配假肢者，安装临时假肢的目的下列哪项是不正确的（）。

A.弥补截肢者外观缺陷

B.促进残肢定型

C.早日开始步态训练

D.使截肢者的家属得到安慰

E.预防关节挛缩
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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．liquid

B．gas

C．misty

D．solid
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