图形符号文字符号M表示()。
A.并励直流电动机
B.串励直流电动机
C.发电机
D.直流测速发电机
参考答案:A
赤道周长约40000千米,诗句“坐地日行八万里”所指的是( )
A.北极点
B.南极点
C.赤道
D.北回归线
There was a chance in a million that she might be right. Which of the following phrases can be used to replace “a chance in a million”?[ ]
A. the scarcest chance
B. the greatest chance
C. the remotest chance
D. the lightest chance