In July of 1994, an astounding series of events took (31) . The world anxiously watched as, every few hours, a hurtling chunk of comet plunged into the atmosphere of Jupiter. All of the twenty-odd fragments, collectively (32) comet Shoemaker-Levy 9 after its discoverers, were once part of the same object, now dismembered and strong out along the same orbit. This cometary train, glistening like a string of pearls, had been first glimpsed only (33) few months before its fateful impact with Jupiter, and rather quickly scientists had predicted (34) the fragments were on a collision course with the giant planet. The impact caused (35) explosion clearly visible from Earth, a bright flaming fire that quickly expanded as each icy mass incinerated itself. When each (36) shammed at 60 kilometers (37) second into the dense atmosphere, its immense kinetic energy was transformed (38) heat, producing a superheated fire ball that was eject
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A. 2～4 B. 4～6 C. 6～8 D. 8～10 [判断题]手提式灭火器压力指示器表盘上的字母“P”表示该灭火器的灭火剂为泡沫灭火剂
A.正确 B.错误 [单选题]TZ型接触电阻检测仪，开机后需预热（）才可以正 常工作。
A.Imin B.2min C.5min D.lOmin [填空题]自动空气制动机的基本原理是：向制动管（）时，制动机产生缓解作用；当制动管减压时，制动机产生制动作用。
[单选题]停车信号应插设在（）前端列车运行方向左侧车体上
A.机后一位车辆 B.机车后部 C.机后二位车辆 D.机车前端 [单选题]早期肺癌，首选的治疗方法，是
A.药物治疗 B.放射疗法 C.放疗加化疗 D.手术切除病肺 E.免疫疗法 [多项选择]对效果指标的识别，要求指标具有（）。
A. 有效性 B. 灵敏性 C. 数量化 D. 同一性 [单选题]满堂模板、建筑层高8m及以上和梁跨大于或等于15米的模板,在安装、拆除作业前,( )应以书面形式向作业班组进行施工操作的安全技术交底,作业班组应对照书面交底进行上、下班的自检和互检。
A.安全管理人员 B.工程技术人员 C.项目经理 D.企业负责人 [单选题]G.652光纤接头衰减平均值不大于（ ）dB
A.0.06 B.0.08 C.0.14 D.0.12 我来回答: 提交
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