| Mr. Peter Johnson, aged twenty-three,
battled for half an hour to escape from his trapped car yesterday when it landed
upside down in three feet of water. Mr. Johnson took the only escape
route—through the boot (行李箱). Mr. Johnson’s car had finished up in a ditch (沟渠) at Romney Marsin，Kent after skidding on ice and hitting a bank. "Fortunately, the water began to come in only slowly," Mr. Johnson said. "I couldn’t force the doors because they were jammed against the walls of the ditch and dared not open the windows because I knew water would come flooding in." Mr. Johnson, a sweet salesman of Sitting Home, Kent, first tried to attract the attention of other motorists by sounding the horn and hammering on the roof and boot. Then he began his struggle to escape. Later he said, "It was really a half penny that saved my l A. Mr. Johnson’s car stood on its boot as it fell down. B. Mr. Johnson could not escape from the door because it was full of sweet jam. C. Mr. Johnson’s car accident was partly due to the slippery road. D. Mr. Johnson struggled in the pouring mud as he unscrewed the back seat. [单选题]将已经淬火的钢重新加热到一定温度，再用一定方法冷却，这种热处理方法是（ ）。
A.正火 B.退火 C.淬火 D.回火 [判断题]判断题()充装压力是气瓶充装气体结束时瓶内气体的压强。
A.正确 B.错误 [单选题]63、10kV真空断路器动静触头之间的断开距离一般为( )。
A.5-10mm B. 10-15 mm C.20-30mm [单选题]孔径经钻孔、扩孔后,用铰刀对孔进行提高尺寸精度和表面质量的加工叫( )。(易)
A.打孔 B.修孔 C.削孔 D.铰孔 [单选题](65899)指针式万用表的欧姆调零装置是一个( )。(2.0分)
A.可调电感器 B.可调电容器 C.电位器 D.编码器 [判断题] 如事故发生在正线,救援汽车司机应将救援汽车驾驶至最近的车站,并将救援汽车停在离最近的残疾人电梯处(1.0分)
A.正确 B.错误 [判断题]【判断题】进行配电设备的带电作业时,禁止同时拆除带电导线和地电位的绝缘隔离措施;禁止同时接触两个非连通的带电导体或带电导体与接地导体。
A.正确 B.错误 [名词解释]角系数Xa，b
[单选题]采掘工作面或其他地点发现突水征兆时，应当立即停止作业，报告( )，并发出警报，撤出所有受水威胁地点的人员。
A.A．矿调度室 # B.B．矿长 # C.C．安全科 [不定项选择题]《建设项目环境影响评价资质管理办法》规定了不同资质的评价机构的评价范围，下列说法错误的是()。
A.甲级评价机构可以在资质证书规定的评价范围之内，承担各级环境保护行政主管部门负责审批的建设项目环境影响报告书和环境影响报告表的编制工作 B.甲级评价机构可以承担各级环境保护行政主管部门负责审批的建设项目环境影响报告书和环境影响报告表的编制工作 C.乙级评价机构可以在资质证书规定的评价范围之内，承担省级以下环境保护行政主管部门负责审批的环境影响报告书或环境影响报告表的编制工作 D.乙级评价机构可以承担省级以下环境保护行政主管部门负责审批的环境影响报告书或环境影响报告表的编制工作 [简答题]三边孔是如何构成的？通过哪些结构？
[单选题](49084)电流在流通中发生中断,称为( )。
A.短路 B.断路 C.线路短路 D.负载断路 我来回答: 提交
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