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【简答题】
两平面立体相交、平面立体与曲面立体相交、两曲面立体相交,其相贯线形状有何不同?
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反馈参考答案：
举一反三
【单选题】They usually have a short ______ after lunch. [ ]
A.
sleeping
B.
sleep
C.
to sleep
D.
asleep
【单选题】"one short sleep past, we wake eternally" is taken form te poem written by _______.
A.
William shakespeare
B.
John Donne
C.
John Milton
D.
John Keats
【简答题】Unlike humans who tend to have one long sleep, dogs prefer to sleep in ______.
【单选题】A vessel sounding a fog signal of one short，one prolonged，and one short blast is indicating that the vessel is ().
A.
fishing
B.
in distress
C.
at anchor
D.
not under command
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