题型:问答题 简答题 根据对话内容,从方框内选择合适的句子补全对话。(有两项多余)A. I don’t think so.B. What’s the problem? C. That’s a good idea. D. What’s the reason?E. You’re welcome. F. But what should I do now? G. How are you doing these days?A: I have a problem, Bob. I’m very worried.B: (1) ___________A: My pen pal from Canada hasn’t replied to my last two e-mails yet. I don’t think she will write to me anymore.B: (2) ___________ Probably she’s busy these days.A: Maybe you’re right. (3) ___________B: Why don’t you send her an e-card and tell her you miss her very much?A: (4) ___________ Thanks for your advice, Bob.B: (5) ___________ 查看答案
题型:问答题 简答题 关于高频电磁辐射屏蔽叙述不正确的是( )。A.(A) 机理是利用电磁感应现象B.(B) 主要依靠屏蔽体的吸收和反射作用C.(C) 对于微波来说。屏网目数一定要大D.(D) 当屏蔽厚度在10mm以内时,屏蔽效率随屏蔽厚度的增加而增加 查看答案
题型:问答题 简答题 交流系统110kV及以上单芯电缆金属层单点直接接地时,在()情况下,宜沿电缆邻近配置平行回流线。A.系统短路时电缆金属层产生的工频感应电压,超过电缆护层绝缘的耐受强度或护层电压限制器的工频耐压 B.接地电阻达不到要求 C.可能出现的工频或冲击感应电压,超过电缆绝缘的耐受强度时 D.需抑制对电缆邻近弱电线路的电气干扰强度 查看答案
题型:问答题 简答题 27岁风心病患者,现妊娠8周出现心力衰竭,下列哪项处理原则正确A.立即行吸宫术终止妊娠B.控制心力衰竭后继续妊娠C.控制心力衰竭后行吸宫术终止妊娠D.边控制心力衰竭边终止妊娠E.以上都不是 查看答案