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【简答题】
高产母牛在泌乳期通常出现只排卵而无 发情 症状 的现象,称为 。
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反馈参考答案：
举一反三
【判断题】防止轮齿折断失效的措施:选用较大模数,适当增大齿根圆角半径以减小应力集中,合理提高齿轮的制造精度和安装精度,正确选择材料和热处理方式以及对齿 根进行喷丸、碳压等强化处理。
A.
正确
B.
错误
【简答题】Where
does Arthur Mitchell say they keep a large supply of cubicle desk units?(Arthur Mitchell 说他们在哪里存有大量的带隔断的办公桌)A. In stock. (现有） B. In
the showroom.（陈列室） C. In
the warehouse.（仓库） D. In
the factory.
【单选题】Where was the magical sword after the death of Arthur?
A.
It was thrown into a lake and looked after by the magical lady of the lake.
B.
It was ruined during a battle against Morgan.
C.
It was inherited by the next king.
D.
It was buried with King Arthur after his death.
【简答题】行业生命周期可以分为（ ）。
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