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用成形刀具加工成形面,刀具的制造和刃磨比较简单。()

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只有在页面视图下才能显示页码。()

I&39;m glad you told me about the show being cancelled, __________ I&39;d have traveled all the way to Glasgow for nothing

A. otherwise
B. because
C. therefore
D. however

用于监控的样品关键是要选择稳定、均匀的样品。()

为何用酸水解法测定多淀粉植物性样品的淀粉含量时所得的结果与实际含量不符？