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【单选题】
带轮相互位置不正确会带来张紧不均和过快磨损,中心距不大用( )测量。A.
长直尺
B.
卷尺
C.
拉绳
D.
皮尺
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】Western nations have older and shrinking populations since they entered the 21st century and their ( ) birth rates have also posed problems.
A.
prejudiced
B.
respective
C.
fluctuating
D.
enlightening
【单选题】Western nations have older and shrinking populations since they entered the 21st century and their _____ birth rates have also posed problems.
A.
fluctuating
B.
flourishing
C.
enlightening
D.
motivating
【单选题】Western nations have older and shrinking populations since they entered the 21st century and their ______ birth rates have also posed problems.
A.
fluctuating
B.
enlightening
C.
investigating
D.
preserving
【单选题】Western nations have older and shrinking populations since they entered 21 st century and their _____ birth rates have also posed problems.
A.
high
B.
lowering
C.
fluctuating
D.
improving
【单选题】Western nations have older and shrinking populations since they entered the 21st century and their _______ birth rates have also posed problems.
A.
revolving
B.
investigating
C.
restoring
D.
fluctuating
【单选题】Western nations have older and shrinking populations since they entered the 21st century and their ______ birth rates have also posed problems.
A.
fluctuating
B.
enlightening
C.
investigating
D.
implementing
【单选题】. -- What does the sign on the wall read? --“ No person ______ enter it without permission.”
A.
will
B.
may
C.
shall
D.
must
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