皮皮学，免费搜题
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搜题
【单选题】
命令行的快捷键是( ),它的文本窗口默认状态下( )行。A.
F1、500
B.
F2、200
C.
F2、500
D.
F1、300
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Years have passed. I find mother has________.
A.
a little white hair
B.
much white hair
C.
some white hair
D.
a few white hairs
【单选题】Two years has passed since I ______you the first time．
A.
meet
B.
have met
C.
met
D.
had met
【单选题】Though nine years have passed,I still remember_________to Mr.Li during my visit there.
A.
introducing
B.
being introduced
C.
to be introduced
D.
Introduced
【单选题】Fifteen years have passed since we graduated from the middle school.I have found she has______.
A.
some white hair
B.
much white hair
C.
a few white hairs
D.
a little white hair
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