（）是将压力能转变为机械能的能量转换装置。
A、三联泵
B、油马达
C、各种控制阀
D、蓄能器
参考答案：B
一个服装小组，每人每天做4套服装，25人28天共做多少套？
He always thinks more ______ than of______, 80 we really like him. [ ]
A. him; other
B. himself; the other
C. others; himself
D. the other; himself
