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【单选题】
在螺栓连接中,有时在一个螺栓上采用双螺母,其目的是A.
提高强度
B.
提高刚度
C.
放松
D.
减小每圈螺纹牙上的受力
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举一反三
【单选题】Bang & Co., began July with finished goods inventory of $10,000. The cost of goods manufactured during the month was $85,000, and the ending finished goods inventory was $20,000. What was the cost of ...
A.
$55,000
B.
$75,000
C.
$85,000
D.
$95,000
【简答题】公司成立日期是（ ）。
【单选题】The universe began with the Big Bang 13.7 billion years ago, with everything___ in space smaller than a grain of sand.
A.
started
B.
starting
C.
to start
D.
to be started
【单选题】Many scientists believe that the universe began with an enormous explosion called the “Big Bang”, ______ happened about 13.7 billion years ago.
A.
that
B.
which
C.
when
D.
what
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