网络课件的类型有（）、可扩展性、交互性、易浏览性。
A.观察性
B.演示性
C.协作性
D.可移植性
参考答案：D
Our teacher is clever, but not good at __________ his ideas to us.
A．getting across
B．getting over
C．getting on
D．getting into
WK-10型电铲卷扬电动机与卷扬一轴是通过（）联轴器联接。
