对动作按钮进行动作设置后，可以设置为（）动作按钮时超链接到目标文件或应用程序。
A.鼠标移过
B.鼠标单击
C.鼠标右击
D.鼠标拖动
参考答案：A, B
— Hurry up! Alice and Sue are waiting for you at the school gate.
— Oh! I thought they________ without me. [ ]
A. went
B. are going
C. have gone
D. had gone
摩擦防松包括：（）；（）、自锁螺母等。
