在Word 2000中复制一段文字，则在“选择性粘贴”对话框中有______种形式的粘贴对象。
A．8
B．7
C．6
D．5
参考答案：B
The task _______ by the time you come back.
A．has been completed
B．will have been completed
C．will complete
D．has completed
标志是说明______的概念。
A．总体单位特征 B．总体单位数量特征C．总体数量特征 D．总体品质特征
