活塞环搭口间隙的作用是（）。
A．便于环的安装
B．使环具有弹力
C．给环受热变形的余地
D．便于散热
参考答案：C
少计提固定资产折旧会造成当期固定资产的净值减少。( )
---Do you prefer _______ to Beijing by air?
---I would rather _______ a train.
A．going, to take
B．going, to take
C．to go, take
D．to go, to take
