Where Did All the Ships Go The Bermuda Triangle is one{{U}} (51) {{/U}}the greatest mysteries of the sea. In this triangular area between Florida, Puerto Rico and Bermuda in Atlantic, ships and airplanes{{U}} (52) {{/U}}to disappear more often than in{{U}} (53) {{/U}}parts of the ocean. And they do so{{U}} (54) {{/U}}leaving any sign of all accident or any dead bodies. It is{{U}} (55) {{/U}}that Christopher Columbus was the first person to record strange happenings in the area. His compass(指南针) stopped working, a flame came down from the sky, and a wave 100 to 200 feet high carried his ship about a mile away. The most famous disappearance in the Bermuda Triangle was the US Naval Air Flight 19.{{U}} (56) {{/U}} December 5,1945, five bomb A. also B. no C. more D. beside [判断题]根据《3-110kV高压配电装置设计规范》规定,气体绝缘金属封闭开关设备配电装置宜采用多点接地方式。外壳和支架上的感应电压,正常运行条件下不应大于24V,故障条件下不应大于100V。
A.正确 B.错误 [单选题]在移位密码中,密钥k=6,明文字母为U,对应的密文字母为()。
A.A B.B C.C D.D [简答题]create procedure xxk6
( @a char(8),@b varchar(10) ) as begin delete from score where 学号=@a and 课程名=@b end [判断题]实行电子证书后,国铁集团所属各级管理部门检查职工持证上岗时,一律检查电子证书。()
A.正确 B.错误 [单项选择]急性左心衰竭的突出临床表现是()
A. 吸气性呼吸困难 B. 双下肢水肿 C. 胸腔积液、腹水 D. 面色潮红 E. 严重呼吸困难、咳嗽、咳粉红色泡沫痰 [判断题]由于黏性介质系数KQ小于1,所以同样操作条件下,离心泵输送油时的流量比输送水时的流量要小。 ( )
A.正确 B.错误 [简答题]哪些情况以调度命令作为行车凭证,向区间发出列车?
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