液压传动是以密封容积中的()作为工作介质来传递运动和动力传动。
A.汽油
B.煤油
C.柴油
D.受压液体
参考答案:D
Be calm, Madam, can you remember _____ you had your mobile phone stolen? [ ]
A. when was it that
B. that it was when
C. where it was that
D. it was where that
一般认为,社会功能不包括()
A.自理的生活能力
B.人际交往与沟通能力
C.工作学习和操持家务
D.关心帮助他人
E.遵守道德规范