| Space is a dangerous place, not only because of
meteors (流星) but also because of rays from the sun and other stars. The
atmosphere again acts {{U}} (62) {{/U}} our protective blanket on
{{U}} (63) {{/U}}. Light gets through, and this is essential
{{U}} (64) {{/U}} plants to make the food which we {{U}} (65)
{{/U}} . Heat, {{U}} (66) {{/U}}, makes our environments tolerable
and some ultraviolet rays (紫外线) penetrate the {{U}} (67) {{/U}}. Cosmic
(宇宙的) rays of various kinds come {{U}} (68) {{/U}} the air from outer
space, but {{U}} (69) {{/U}} quantities of radiation from the sun are
screened off. As {{U}} (70) {{/U}} as men leave the atmosphere they are
{{U}} (71) {{/U}} to this radiation; {{U}} (72) {{/U}} their
spacesuits or the walls of their spacecraft, if they are inside, {{U}} (73)
{{/U}} prevent a lot of radiation damage. Rad A. from B. as C. than D. away [单项选择]受刑法保护而为犯罪行为所侵害的社会关系是（）
A. 犯罪客体 B. 犯罪客观 C. 犯罪主体 D. 犯罪主观 E. 犯罪对象 [单项选择]可引起Ⅰ型呼吸衰竭的是（）。
A. 急性间质性肺炎 B. 结节病Ⅰ期 C. 原发综合征 D. 重症肌无力 E. 纵隔淋巴瘤 [判断题]依据《生产安全事故报告与调查处理条例》的规定，安全生产监督管理部门和负有安全生产监督管理职责的有关部门逐级上报事故情况，每级上报时间不得超过 4小时。()
A.正确 B.错误 [简答题]一种白色不透明颜料，涂在纸上以遮盖错字的文具叫什么？
[单选题]婴儿腹泻有明显周围循环衰竭时扩容用
A.高张含钠溶液 B.等张含钠溶液 C.2/3张含钠溶液 D.1/2张含钠溶液 E.1/3张含钠溶液 [单选题] 沼气的主要成分为( ),池内属易燃易爆和有毒场所。
A. 甲烷 B. 乙烷 C. 丙烷 D. 丁烷 [多选题]在低压设备上作业时一般应停电进行。若必须带电作业时，应采取哪些措施（ ）。
A.作业人员要穿紧袖口的工作服，戴工作帽、手套和防护眼镜 B.穿绝缘靴或站在绝缘垫上工作 C.所用的工具必须有良好的绝缘手柄 D.附近的其它设备的带电部分必须用绝缘板隔开。 我来回答: 提交
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