更多"[单选题]If you work on the problem for"的相关试题:
[单选题]—Haven't seen you for ages! Do you still work in Shanghai?
—______. It is 2 years since I worked there. ( )(
A. Yes, I do
B. No, I don't
C. Yes, I have
D. No, I haven't
[单选题]
--_____ did you work out the problem in such a short time? --With Mr.Li’s help.
A. When
B. Where
C. How
D. Which
[单选题]—I can hardly breathe. Would you please put your cigarette out?—______ ( )
A. I can't.
B. No. It's my own business.
C. I'm sorry I'm bothering you, but this is the smoking section.
D. Yes,I will.
[单选题] “Have you finished your work?” “No, ________.”
A.haven’t
B.not yet
C.already not
D.don’t yet
[单选题]—I'm sorry. I______at you the other day.
—Forget it. I was a bit out of control myself. ( )
A. shouldn't shout
B. shouldn't have shouted
C. mustn't shout
D. mustn't have shouted
[单选题] It is a fine day today. You _______ take a raincoat with you.
A.mustn’t
B.can’t
C.may
D.needn’t
[简答题]台湾女歌手王心凌的哪首歌曲翻唱自M2M组合的《The day you went away》？
[单选题]You should______some time for your hobby in your spare time.( )
A. set about
B. set up
C. set aside
D. set off
[多选题] 141．Y441、Y341、Y211、Y221、Y421下井过程中（）。
A.匀速下放
B.快速下放
C.不得猛顿猛放
D.猛顿猛放
[多选题]220kV某变，主变接线组别应为Y，Y，Y，厂家人员将主变保护接线组别误设为Y，Y，△，送电时因负荷电流过小，差流较小，未能发现此错误，投运后，当发生低压侧区外故障时，主变保护动作。通过本案例，对照十八项反措，谈谈你的看法(____)。
A.严格执行继电保护现场标准化作业指导书，规范现场安全措施，防止继电保护“三误”事故；
B.严格执行有关规程、规定及反措，防止二次寄生回路的形成；
C.当灵敏性与选择性难以兼顾时，应首先考虑以保灵敏度为主，防止保护拒动；
D.所有差动保护（线路、母线、变压器、电抗器、发电机等）在投入运行前，除应在负荷电流大于电流互感器额定电流的10% 的条件下测定相回路和差回路外，还必须测量各中性线的不平衡电流、电压，以保证保护装置和二次回路接线的正确性；
E.基建单位应提供一次设备实测参数等资料
[判断题]( )高压绕组为Y，低压绕组为Y0联结的变压器的联结组别为Y/Y0。
A.正确
B.错误
[单选题] 单绕组三速电动机的2Y/2Y/2Y和2△/2△/2Y两种接线有( )出线端。
A.9个
B.6个
C.3个
D.12个
[多选题]设Y/Y0-12变压器，变比为1，不计负荷电流情况下，当Y0侧单相接地时，Y侧的三相电流是（）
A.Y侧故障相电流等于Y0侧故障相电流的2/3
B.Y侧故障相电流等于Y0侧故障相电流的1/3
C.Y侧非故障相电流等于Y0侧故障相电流的2/3
D.Y侧非故障相电流等于Y0侧故障相电流的1/3
[单选题] 已知集合A={(x,y)|x+2y=6}, B={(x,y)|x-y=3},那么A∩B为( )
A. x=4,y=1
B. {(4,1)}
C. {4,1}
D. (4,1)
[多选题] 142．Y211、Y221、Y421封隔器坐封操作规程有（）。
A.缓慢下放（旋转）
B.快速下放（旋转）
C.加压60-80kN
D.加压40-60kN
[判断题]Y/Y－12的三相变压器可以与Y/△－11的三相变压器并联运行。（）
A.正确
B.错误
[判断题]一台Y/Y－12连接变压器可以与一台Y/△－11连接变压器并联。（）
A.正确
B.错误
