若要同时调整多个图层的不透明度和颜色混合模式，可采用（）方法。 A.创建组合图层 B

比较大小：-5（    ）0。

一足月儿，生后喂奶即出现呛咳及呕吐，X胸片示两肺不张，腹部平片示胃无气体。最可能的诊断为（）

A.膈疝

B.十二指肠闭锁

C.食管闭锁

D.食管裂孔疝

E.双侧后鼻孔闭锁

在下列选项中，属于依法行使公民权利的有

A．举报某企业污染环境

B．到宗教活动场所宣传无神论

C．私自印制报刊杂志发行

D．自愿放弃初中阶段的受教育权利

强直性脊柱炎典型的X线片表现为（）

A.长骨骨干"绒毛状"骨膜炎

B.骶髂关节明显破坏，后期脊柱呈"竹节样"变化

C.都不是

D.指关节受累呈"笔帽-铅笔样"征

E.趾关节受累呈"笔帽-铅笔样"征

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．and

B．so

C．thus

D．but