两轴平行的相互啮合的斜齿轮,它们分度圆柱面上的螺旋角相等，但螺旋角的方向相反。

（1）对于我们来说，弗朗西斯·培根不是一个陌生的名字，至少有千千万万的中国人听说过他那句遐迩传扬的名言：“___________________________”。

（2）“一门三父子，都是大文豪。诗赋传千古，峨眉共比高。”这首诗中的“三父子”指的是              、              、               。

（3）“满纸荒唐言，一把辛酸泪，都云作者痴，谁解其中味”是清代作家            对《                  》创作甘苦的自我感叹。

一急性心梗患者，突然晕厥，心电图为室速160次／分，查血压为80/60mmHg，脉搏触不清，心音弱，无杂音。

此时治疗上述心律失常，应首选（）。

A.西地兰

B.普罗帕酮

C.利多卡因

D.腺苷

E.艾斯洛尔

圆柱普通螺纹的公称直径是指（）径。

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．desired

B．asked

C．ordered

D．need

使用局部通风机通风的掘进工作面，不得停风；若因停电原因停风，在恢复通风前，必须（）

A、来电时，立刻开启局部通风机送风

B、必须检查瓦斯

C、只有在局部通风机及其开关附近10m以内风流中的瓦斯浓度都不超过0.5%时，方可人工开、启局部通风机送风

D、只有在局部通风机及其开关附近20m以内风流中的瓦斯浓度都不超过1%时，方可人工开启局部通风机送风

E、只有在局部通风机及其开关附近20m以内风流中的瓦斯浓度都不超过1%时，方可人工开启局部通风机送风