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Electric Backpack Backpacks (背包) are convenient. They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you don’t mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, and maybe even light your way home. Lawrence C. Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole, Mass. , have invented a backpack that makes electricity from energy produced while its wearer walks. In military actions, search-and-rescue operations, and scientific field studies, people rely increasingly on cell phones, global positioning system (GPS) receivers, night-vision (夜视镜) gogg A. It produces electricity for electronic devices while the wearer walks. B. It can be used as cell phones, GPS in the military actions or field studies. C. It is small and convenient. D. It is light and easy to carry. [填空题]动车组通过检修、检测设备的限速规定：自走行时，通过限速（ ）km/h
[简答题]联系我国实际说明货币需求的决定因素。
[判断题]茶叶卫生标准GB2762-2012对茶叶中的稀土含量规定仍延用GB2762-2005的标准，即稀土≤2.0ppm（mg/kg）。
A.正确 B.错误 [单选题]轨面湿滑制动时做到（ ）。
A.快拉少拉 B.早拉少拉 C.大拉大缓 D.立即停车 [单选题]《南京市轨道交通管理条例》是南京市人大常委会于2014年制定的，其性质属于（ ）
A.部门规章 B.地方性法规 C.地方政府规章 D.行政法规 [判断题]在试验和推广新技术、新工艺、新流程、新装备、新材料的同时，应制定相应的安全技术措施，经本单位分管领导批准后执行。
A.正确 B.错误 [单项选择]《城乡规划法》规定，以（）提供国有土地使用权的，建设单位在报送有关部门批准或者核准前，应当向城乡规划主管部门申请核发选址意见书。
A. 划拨方式 B. 出让方式 C. 租赁方式 D. 审批方式 [单项选择]用于心动过缓、低血压、窦缓伴室早患者的是（）。
A. 阿托品 B. 参附注射液 C. 参麦注射液 D. 清开灵注射液 E. 醒脑静注射液 我来回答: 提交
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