直肠指诊时发现前列腺腺体内有坚硬如石的不光整结节，最可能的是（） A.前列腺炎 B.

文字狱自古就有，统治者实行文字狱的目的都是为了

A．笼络人才

B．选拔官吏

C．稳定社会秩序

D．从思想上控制人民

评价某一指标的当前状态的基本方法是找出一个（）作为“参照物”，将指标的当前状态与之进行比较。

A．标准水平

B．发展水平

C．一般水平

D．相对水平

转炉炼钢去硫一般有炉渣脱硫和（）两种方式，此外还有许多钢厂采用炉外脱硫的方式。

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

下列命令哪些是fscommand函数中所包含的（）。

A、fullscreen

B、allowscale

C、showmenu

D、trace