()属液压传动的执行部分。
A.液压马达
B.液压油泵
C.涡轮机
参考答案:A
It is said that he has and will arrive home in a few hours.
A.be set free
B.been set free
C.be set out
D.set off
__________是校本课程开发的主要力量,在校本课程开发的整个过程中,他不仅是亲历 者还是监督者。