[单选题]The word“confront”(1ine 2,para 4)most probably means“________”.A.bring face to faceB.find outB.understandD.accept
[名词解释] 联结线(bonding conductor)
[单选题]C.onductor: Good morning, , please?Passenger: Here you are.A. can I have your ticketB. anything to declareC. can I help youD. anything special
[名词解释] 中性线(neutral conductor)
[名词解释] 接地线(earthing conductor)
[名词解释] 保护线(PE线,protective conductor)
[单选题]Train conductor: Excuse me, mama. Ticket, please.Passenger: Sorry. I left it in the smoking section and I'll go fetch it.Train conductor: It's OK, lady._________ .A. Take your timeB. Take your seatC. You can go nowD. As you please
[单选题]流过相线的电流称为(),相线与相线之间的电压称为()。A.相电流相电压B.相电流线电压C.线电流相电压D.线电流线电压
[填空题] 相线与相线之间的电压成为(),相线与零线之间的电压成为()。
[判断题] 相线与相线间的电压就是线电压。A . 正确B . 错误