如图所示机构,中间轴是()
A.曲轴
B.传动轴
C.转轴
D.心轴
参考答案:B
My grandma didn’t go to sleep ___________ I got back home.[ ]
A. where
B. until
C. as soon as
D. while
弗洛伊德认为心理发展的动力来自于()
A.遗传
B.环境
C.性本能
D.超我
E.学习