| Electric Backpack Backpacks are convenient. They can hold your books, your lunch, and a charge 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 goggles, and other battery-powered devices to get around and do their work. The A. You will be too excited to watch the traffic. B. Enjoying electronic devices while walking may invite traffic accidents. C. It is not possible for you to get such a backpack. D. It is wise of you to have such a backpack. [判断题]抢险救援消防车定期(每六个月或3000km)检查车箱及其他总成与车架连接的可靠性,必要时采取紧固措施。( )
A.正确 B.错误 [填空题]数字证书认证方式企业客户单笔交易限额为（），日累计限额为1000万元。
[单项选择]下列除哪项外均是金钱草的功效( )
A. 解毒消肿 B. 利湿退黄 C. 疏肝利胆 D. 软坚排石 E. 利尿通淋 [单选题] (单选题)张伟，男。36岁，因车祸内脏破裂大出血而欲行急诊手术。去手术室之前，护士遵医嘱迅速为患者建立了一个静脉通道并进行输血治疗。因时间紧迫，护士从血库取回血厚，为了尽早将血输给患者，便将血袋放在热水中提温，5min 后便给患者输入。当输入10min 后，患者头部胀痛，并出现恶心呕吐，腰背部剧痛。预防此反应发生的有效措施中不正确的是
A. 输血前预防性地给予抗过敏药物 B. 认真做好血型鉴定和血交叉配血试验，保证结果正确 C. 输血前需由两人重新核对姓名、血型、交叉配血结果，相符时方可输入 D. 取回血液不能剧烈震荡或加温 E. 输入的血液内不能加入其它药物 [不定项选择题]主动脉瓣关闭不全
A.胸骨左缘3～4肋间收缩期杂音 B.胸骨左缘3～4肋间舒张期杂音 C.胸骨左缘第2肋间舒张期杂音 D.胸骨左缘第2肋间收缩期杂音 E.心尖区收缩期杂音 我来回答: 提交
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