侧行位舞姿
参考答案:指男士的右侧与女士的左侧身体紧密贴靠,身体的另一侧略向外展开成“V”形的站立或行进的身体位置。
—I thought you wouldn't mind. — Well, as a matter of fact, I don't, but you ______ me first.
A. should ask B. should have askedC. must ask D. must have asked
如图所示,为一轻质弹簧的长度L和弹力F的大小关系图线,试由图线确定:
(1)弹簧的原长;
(2)弹簧的劲度系数;
(3)弹簧伸长0.15m时,弹力的大小。