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【简答题】
连接种工作面为 _______ ,主要失效形式为工作面的 _____ 和磨损,在组成键连接的零件(轴、键、轮毂)种, _________ 材料最弱。
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反馈参考答案：
举一反三
【简答题】The 5th sentence (This ... position.)
【单选题】In the 10th and11th centuries in southern European, women’s social position was ______.
A.
higher than men’s
B.
as high as men’s
C.
lower than men’s
D.
never recognized
【单选题】A neutral equilibrium position for a vessel means that the metacenter is ______.
A.
lower than the keel
B.
at the same height as the center of gravity
C.
exactly at midships
D.
at the center of the waterplane area
【判断题】English has a complex system of consonant clusters, in which two or more consonants occur in sequence in onset or coda position.
A.
正确
B.
错误
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