汽车硅整流发电机定子三相绕组的末端汇接在一起，形成发电机的（）。
A.正极
B.负极
C.O点
D.中性点
参考答案：D
造句。
①苏醒：__________________________________
②次第：__________________________________
③销声匿迹：__________________________________
④花香鸟语：__________________________________
It seems that living green is ________ easy and affordable. A small step makes a big difference. [ ]
A. exactly
B. fortunately
C. surprisingly
D. hardly
