先队活动课的主角应当是:()。
A、队干部
B、队员
C、辅导员
D、队员和辅导员
参考答案:B
―What colours can give you a happy and satisfied feeling?
―________.
A.Blue and yellow
B.Orange and white
C.Orange and yellow
D.Red and yellow
对检修中互感器的引线有哪些要求?