当活塞上安装四道活塞环时,其安装位置应错开()。
A、90度
B、120度
C、180度
D、270度
参考答案:B
She is Linda Brown. Her ______ is Brown.
A.first name
B.family name
C.given name
D.full name
---How about camping this weekend, just for a change?
---OK, ____you want.
A.whichever
B.however
C.whatever
D.whoever