整体式向心滑动轴承装配压入轴套后，要用紧定螺钉或定位销等元件固定轴套位置。

下列人口问题在印度比较突出的是[ ]

A．老年人增加，社会负担加重  

B．国防兵源不足  

C．交通拥挤，就业困难  

D．人口从城市迁移到农村

关于水肿，下列哪项描述是正确的

A．心源性水肿常从颜面开始

B．肾源性水肿常从身体的低位开始

C．肝源性水肿常以腹水为主要表现

D．肾源性水肿常不伴高血压

E．甲状腺功能低下的患者常出现下肢可凹性水肿

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．stayed

B．controlled

C．detained

D．held

2005年，美国宇航局执行“深度撞击”计划，一艘太空飞船释放出一个撞击器，撞向“坦普尔一号”彗星的彗核部位，引发世界关注。时隔近6年之后，另一艘美国飞船再次接近这颗彗星。通过图像对比，科学家发现该彗星的彗核表面有发生侵蚀作用的痕迹。“坦普尔一号”彗星彗核表面的侵蚀痕迹证明（）

①自然界中的事物是按自身所固有的规律形成和发展的

②自然界的运动、变化无不体现出人的作用和印记

③天地自然万物在本质上都是物质的

④世界的统一性在于它的物质性

A.①②

B.①②③

C.①③④

D.①②③④

"太阳病，其证备，身体强，几几然，脉反沉迟，此为痉"，主治方为（）

A.葛根汤

B.瓜蒌桂枝汤

C.大承气汤

D.桂枝加葛根汤

E.麻黄加葛根汤