| Museums have changed. They are no
longer places that one "should" go to but now they are places to
enjoy. At a science museum in Canada, you can feel your hair stand on end as harmless electricity passes through your body. At the Children’s Museum in New York, you can play an African drum. There are no "Do Not Touch" signs in some other museums in the USA. More and more museum directors have realized that people learn best when they can become part of what they are seeing. In many science museums, the visitors are encouraged to touch, listen, operate and experiment so as to discover scientific rules for themselves. The purpose is not only to provide fun, but also help people feel at home in the world of science. If people don’t understand science, they will be afraid of it; and if they are afraid of science, they wi A. many of them hope to take part in the art B. many of them have a new way of thinking C. many of them are better educated D. all of the above [简答题]站容标准是什么？
[单选题]男，40岁外伤后测中心静脉压为4ｃｍＨ2Ｏ，外周动脉血压在正常范围，该患者可能是以下哪种情况( )
A.心功能不全 B.血容量不足 C.血容量过多 D.容量血管过度收缩 [多选题]根据《建设工程文件归档规范》,施工管理文件包括( )。
A.工程概况表 B.施工检测计划 C.见证试验检测汇总表 D.工程技术文件报审 E.图纸会审记录 [简答题]怎样判断推力、上导油色是否正常?
[判断题]有施工作业车参加作业时，涉及进路准备的道岔和按钮由车站信号操纵人员负责，车站准备进路期间禁止电务部门操纵道岔和按钮。
A.正确 B.错误 [单选题]柴油具有( )的特点。
A.不易蒸发,且其自然温度比汽油低; B.不易蒸发,且其自燃温度比汽油高; C.易蒸发,适宜做溶剂。 [判断题]电器着火的正确扑救方法是先切断电源，再用干粉灭火器或二氧化碳灭火器灭火。
A.正确 B.错误 [单项选择]
{{B}}· You will hear a radio interview with Richard Wood, the founder of Bookstore, a company that sells books on the internet. · For each question 23-30 mark one letter (A, B or C) for the correct answer. · After you have listened once, replay the recording.{{/B}} [单选题]生产经营单位发生生产安全事故时,单位的主要负责人应当立即组织抢救,并不得在( )期间擅离职守。
A.事故预防控制 B.事故调查处理 C.事故善后处理 D.事故责任追究 [单项选择]睾丸间质细胞的主要生理功能是（）
A. 营养和支持生殖细胞 B. 产生精子 C. 分泌雄激素 D. 促进精子成熟 E. 起血睾屏障作用 [单选题]挖到电缆保护板后，应由（ ）在场指导，方可继续进行。
A. A.工区领导 B.B.工作负责人 C.C.有经验的人员 D.D.运维人员 [单项选择] 阅读下列短文，然后根据短文的内容从每小题的四个选择项中，选出最佳的一项。 A
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