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【单选题】
在给定一个、平行度的公差带是( )。A.
距离为公差值t的两平行直线之间的区域
B.
直径为公差值t,且平行于基准轴线的圆柱面内的区域
C.
距离为公差值t,且平行于平面(或直线)的两平行平面之间的区域
D.
正截面为公差值T1×T2、且平行于基准轴线的四棱柱内的区域
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举一反三
【单选题】While browsing, the mind is ________________; while searching, it is __________________.
A.
exploratory and focused; curious and purposeful
B.
exploratory and curious; focused and purposeful
C.
curious and focused; exploratory and purposeful
D.
curious and purposeful; exploratory and focused
【单选题】While browsing, the mind is _________ and _________; while searching, it is ________ and _______.
A.
exploratory and focused; curious and purposeful
B.
exploratory and curious; focused and purposeful
C.
curious and focused; exploratory and purposeful
D.
curious and purposeful; exploratory and focused
【简答题】While browsing, the mind is _____ and _____ ; while searching, it is _______ and ________ .
【简答题】Until yesterday, his family (not hear) from him for three years.A. hadn’t heard
【单选题】Until yesterday, his homework had not________finished.
A.
being
B.
be
C.
been
D.
to be
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