窗口的移动操作是将鼠标指针移到标题栏位置（），然后拖拽到目的位置后放开
A.单击左键
B.单击右键
C.双击左键
D.双击右键
参考答案：A
Seven people in all lost their lives in the accident, three of _____ Chinese.
A．which
B．whom
C．them
D．who
实物原稿
