更多"[单选题]–Howoldareyou,Tom?-I’m__yearso"的相关试题:
[单选题] Tom and I ________ in the same office.
A. am
B. are
C. be
D. is
[单选题] What language did Tom Hofman speak before he came to Paris?
A. He spoke French.
B. He spoke English.
C. He spoke Japanese.
D. We don’t know
[单选题] Why could not the woman understand Tom?
A. Because he spoke too fast.
B. Because he did not want to answer her question.
C. Because he didn’t like to speak French.
D. Because he was not good at speaking French.
[简答题]Tom is very proud ___his new house.
[单选题]电动机负序电流保护，当I2<1.2I1时()I2负序电流，I1正序电流)（1.0分
A. 自动解除闭锁
B. 闭锁保护
C. 发出信号
[单选题] Where have you ________? Tom is looking for you.
A. gone
B. been to
C. gone to
D. been
[单选题] Tom’s composition is better than ________ in the class.
A. anyone’s else
B. anyone else
C. anyone else’s
D. anyone’s else’s
[判断题]电动机负序电流保护 ，当 I2<1.2I1 时闭锁负序电流保护（ I2 负序电流 ，I1 正序电流） 。
A.正确
B.错误
[判断题]电动机负序电流保护 ，当 I2＞1.2I1 时自动解除闭锁（ I2 负序电流 ，I1 正序电流） 。
A.正确
B.错误
[判断题]F486-4I板上CF卡槽上I、II两系CF通用，若II系CF卡损坏，可以使用I系CF使用。
A.正确
B.错误
[判断题]电动机负序电流保护 ，当 I2<1.2I1 时自动解除闭锁（ I2 负序电流 ，I1 正序电流） 。
A.正确
B.错误
[判断题]波形图上病害波形超过I级或 （-I）界线又回落到I级或（-I）界线为一处病害。
A.正确
B.错误
[简答题]I was so busy that I forgot__the Great Wall.
[判断题]电动机负序电流保护,当I2<1.2I1时闭锁 负序电流保护(I2负序电流,I1正序电流)
A.正确
B.错误
[判断题]电动机负序电流保护,当I2>1.2I1时闭锁 负序电流保护(I2负序电流,I1正序电流)。( )
A.正确
B.错误
[判断题]1444. 1444.波形图上病害波形超过I级或（-I）界线又回落到I级或（-I）界线为一处病害。
A.正确
B.错误
[填空题]某一正弦交流电的表达式i=I1sin(ωt+30°)A，I1={#X1#}A。试求其最大值Im=_____A、有效值I=_____A。(计算结果保留小数点后两位)
[单选题] 当ωt=360°时,i1、i2、i3分别为( )。
A.负值、正值、0
B.0、正值、负值
C.负值、0、正值
D.0、负值、正值
