【判断题】发动机排量是指从发动机气缸中排出废气的质量。
【单选题】---Have you known each other for long?
A.
--Not very long, _______ we started to work in the company.
【单选题】The aged are close companions, and many of have known each other for decades.
【单选题】I think students______ to do homework with friends.
【多选题】对于结构确定的发电机,其定子绕组感应出的电动势的大小与()有关。