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【单选题】
在下列有关Windows菜单命令的说法中，不正确的是( )。A.
带省略号(…)的命令被执行后会打开一个对话框，要求用户输入信息
B.
命令前有对勾符号代表该命令有效
C.
当鼠标指向带有黑色箭头符号的命令时，会弹出一个子菜单
D.
灰色字符所显示的命令表示相应的程序被破坏
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反馈参考答案：
举一反三
【单选题】Our teacher told us _______ in class .
A.
listened carefully
B.
to listen carefully
C.
listened careful
D.
to listen careful
【单选题】My mother was cooking while I____the radio.
A.
listened to
B.
have listened to
C.
was listening to
【单选题】They _____ the music. They say it is very wonderful. [ ]
A.
listened to
B.
have listened to
C.
are listening to
D.
listen to
【单选题】The boy _____ he took notes.
A.
listened with attention
B.
listening attentively while
C.
listened attentively before
D.
listening with attention
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