简述气流纺优缺点。
参考答案：
纺纱速度快，产量高，成本低，纱线条干、毛羽比环锭纺纱要好。但只能加工低支纱，强力低，耐磨性不是很好。
Peter, I _______ tell you about it. [ ]
A. would rather not to
B. would rather didn't
C. wouldn't rather
D. would rather not
标准状况下，某种O2和N2的混合气体m g含有b个分子，则n g该混合气体在相同状况下所占的体积（L）应是（ ）
A．22.4nbm×6.02×1023
B．22.4mbb×6.02×1023
C．22.4n×6.02×1023mb
D．nb×6.02×102322.4m
