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问题
判断题
如果货箱表面不允许有摩擦损坏的情况时,需要采用金属托盘。
答案
参考答案:
错
判断题
S500表示每小时500转。
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选择题
In our class
of the students
girls.
A. three fifths; are
B. three fifth; are
C. three fifths; is
D. three fifth; is
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