齿轮半联轴器不能摆动将影响机构正常工作。
参考答案：对
连结多边形（ ）的线段，叫做多边形的对角线。
--Do you know the cost of buying a house in Shanghai is much higher than __ in Tibet?
---Of course, I know. It’s impossible for me to buy_____ there.
A．that; it
B．one; that
C．that; one
D．it; one
