| 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. shifts B. modifies C. converts D. varies [单项选择]补气兼生津安神益智宜选（）
A. 黄芪 B. 人参 C. 山药 D. 甘草 E. 白术 [判断题]截断塞门把手与支管成垂直90度时，即代表关闭截断塞门，该车就视为关门车。
A.正确 B.错误 [简答题] Two Words Is a Minute Description of a Human Need
Famous for citing website design mistakes, Jakob Nielsen, the web’’s original usability guru (指导者) , explains why search has taken over, why adverts aren’’t working, and how to make browsing better.
Technology Guardian: The hype is everywhere about Web 2. 0. How do things like Ajax fit into the guidelines you’’ve been espousing (支持)
Jakob Nielsen: It’’s always been good usability to make interfaces reactive, to have as fast response times as possible. Many of these Web 2. 0 things are tricks to provide it in a faster way. In that sense it works well, it’’s just a programming technique for achieving these goals. I used to say that I don’’t like a lot of functionality inside a web browser, but now you can view the browser more like a programming system or a programming language almost, and therefore your browser can become a support platform. The question then becomes "is that the best way of doing these a
[单选题]以下关于地下水类型的叙述中，错误的是哪一项？( )
A.隔水层上具有自由水面的地下水为潜水 B.能从地面自然涌出的地下水为泉水 C.通过管井从承压水层中喷出地面的地下水为自流水 D.在岩溶裂隙中所含的地下水为岩溶裂隙水 [单选题]溢流阀调定系统工作压力,应根据液压系统允许的超载最大工作压力设定,一般不超过系统额定工作压力的（）。
A.40%～50% B.30%～40% C.20%～30% D.10%～20% [单项选择]小檗碱具有( )
A. 发汗、平喘作用 B. 抗菌作用 C. 镇静、麻醉作用 D. 降血脂作用 E. 消肿利尿、抗肿瘤作用 [单项选择]桡神经支配（ ）
A. 旋前圆肌 B. 桡侧腕屈肌 C. 尺侧腕屈肌 D. 肱三头肌 E. 指深屈肌 [单选题]【单选题】 请以 5000mAh,20C 锂电池为例,解释放电倍率的含义,该电池最大放电为多少? ( )
A.放电倍率(C)=放电电流(A)/额定容(Ah),该电池的最大放电电流为20C×5Ah=100A B.放电倍率(C)=放电电流(A)/额定容(Ah),该电池的最大放电电流为200C×0.5Ah=100A [单选题]ZDJ9转辙机检修作业时，调整遮断器、自动开闭器接点：接点接触深度（ ）。
A.≥2mm B.≥3mm C.≥4mm [简答题]股道号码信号中，昼间显示方式为：两臂交叉于头上，表示<--NRC-->。
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