下列不属于共同犯罪的构成要件是( )。A．共同犯罪的主体为二人以上 B．各犯罪人必

组合式平台脚手架的组装顺序是怎样的？

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．not

B．all

C．enough

D．only

“古罗马……众多的英雄豪杰描绘出一幅波澜壮阔的历史画卷，帝国的辉煌给整个欧洲打下了不可磨灭的烙印。”“不可磨灭的烙印”突出表现在（）

A.罗马法是西方人文精神的源头

B.罗马法成为近代欧洲法律的源头

C.罗马法是世界上第一部成文法

D.罗马建成了地跨亚非两洲的大帝国

单位工程质量竣工验收应由总监理工程师组织。

触摸屏是一种定位设备，系统主要由三个主要部分组成：（）。