下列疾病可出现上述哪种表现？
房室折返性心动过速（）| Time spent in a bookshop can be most
enjoyable, whether you are a book-lover or merely there to buy a book as a
present. You may even have entered the shop just to find shelter from a sudden
shower. But the desire to pick up a book with an attractive dust-jacket is
irresistible. You soon become absorbed in some book or other, and usually it is
only much later that you realize that you have spent far too much time
there. This opportunity to escape the realities of everyday life is, I think, the main attraction of a bookshop. There are not many places where it is possible to do this. A music shop is very much like a bookshop. You can wander round such places to your heart’s content. If it is a good shop, no assistant will approach you with the inevitable greeting: "Can I help you, sir" You needn’t buy anything you don’t want. In a book A. a book on ancient coins. B. a best-selling novel on brass-rubbing. C. a book that only vaguely interests you. D. a book that unexpectedly fascinates you. [单项选择]以成本为基础，加上一定的利润，构成产品价格是( )定价法。
A. 边际成本 B. 最佳盈利 C. 成本加成 D. 目标利润 [单选题]为保证人身安全，除牵引供电专业人员按规定作业外，任何人员及所携带的物件、作业工器具等须与牵引供电设备高压带电部分保持（ ）m以上的距离，与回流线、架空地线、保护线保持（ ）m以上距离，距离不足时，牵引供电设备须停电。
A.1、2 B.2、1 C.1.5、2 D.2、2 [单选题]《国家电网公司电力安全工作规程（信息部分）》中所指的在运信息系统包括“试运行”和“正式运行”的信息系统。
A.正确 B.错误 C.略 D.略 E.略 F.略 [判断题]在公路上或市区内建设塑料管道时,无需征得公路或城建.规划等相关主管部门的同意。( )
A.正确 B.错误 [单选题]作业人员避车时应距钢轨头部外侧距离不少于( )（另有规定除外），设有避车台（洞）的桥梁（隧道）应进入避车台（洞）避车。
A. 2m B. 2.5m C. 3m [填空题]The foundations of robotics technology is mainly composed of the technology of numerical control.
[单选题](21695)0°探头连接通道的扫描线按纵波声程1∶2.5标定，水平裂纹回波在荧光屏刻度4.8，则裂纹距轨面的深度为（）mm处。(1.0分)
A.120 B.110 C.90 D.70 [填空题] Recently a group of Swedish research scientists carried out a (36) ________ of children’’s attitudes to the future. They worked with 10-and 11-year-old children from ten schools (37) ________ in rural and urban areas all over the whole of Sweden.
There were two main steps of the (38) ________. First, all the children were asked to write an essay on the topic "The Future; 2000 AD". Then the scientists went round to the (39) ________ schools to talk to the children, basing their (40) ________ on the general questions "What problems are we (41) ________ now " and "What will the future be like "
A pattern soon (42) ________. It showed that there was (43) ________ agreement about which problems were important and how the problems should be dealt with. (44)________________ .
(45)________________. Summing up the results of the project, one of its leaders said, "We’’ve obviously got to pay more attention to our children. After all, (46)________________."
[单选题]员工小张
法？（ ） A.小张虽然 B.应该严格 C.给予小张 D.偶然一次 [多项选择]施工单位应保证本单位安全生产条件所需资金的投入，对列入建设工程概算的安全作业环境及安全施工措施所需费用，应当用于( )，不得挪作他用。
A. 安全作业人员的酬薪 B. 安全生产条件的改善 C. 安全施工措施的落实 D. 安全员的生活补贴 E. 施工安全防护用具及设施的采购和更新 我来回答: 提交
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