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【多选题】
下面属于软件危机表现的有（）A.
对软件的开发成本不准确
B.
对软件的开发进度估计不准确
C.
软件通常没有适当的文档资料
D.
软件常常是不可维护的
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【单选题】It is the second time that you have been late, ______?
A.
haven’t you
B.
isn’t it
C.
is it
D.
have you
【简答题】It is the first time that you have come toChina, _____? A.haven’t you B. isn’t it C.hasn’tit D. aren’t you
【单选题】It is about time that you ______ yourself a regular job. You can't go on like that.
A.
found
B.
find
C.
will find
D.
would find
【单选题】—This is the first time I_________ my first picture with my own hands. —It is time that you_________a picture for me.
A.
took;took
B.
have taken;took
C.
took;will take
D.
will take;have taken
【单选题】It is time that you ______ down to your work. [ ]
A.
get
B.
got
C.
would get
D.
have to
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