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搜题
【多选题】
三极管的工作状态有那些
A.
截止状态
B.
放大状态
C.
饱和导通状态
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举一反三
【单选题】Ten minutes______too short a time to finish this test.
A.
is
B.
are
C.
has
D.
have
【单选题】Ten minutes __________too short a time to finish this test.
A.
is
B.
has
C.
are
D.
have
【判断题】作业中心既是成本汇集中心,又是责任考核中心。( )
A.
正确
B.
错误
【单选题】It takes __ two days to finish this report.
A.
the
B.
him
C.
his
【单选题】Ten minutes _____ too short a time to finish this.
A.
be
B.
is
C.
are
D.
\
【单选题】— How soon can you finish this job? — Two days _____ enough for me to finish the work. I need a week. [     ]
A.
isn't
B.
aren't
C.
is
【单选题】—Must I finish this job today? —No, you . You can finish it tomorrow.
A.
mustn’t         
B.
needn’t         
C.
can’t
【简答题】平移滑移沿着进行 。
【简答题】平移滑移沿着一定的结晶面和 进行。
【单选题】地下管线图编制不常采用的比例尺是( )
A.
1:500
B.
1:1000
C.
1:2000
D.
1:5000