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【单选题】
修整砂轮的金刚石笔,其金刚石颗粒的大小,应根据砂轮的( )来选择。A.
硬度
B.
速度
C.
粒度
D.
直径
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举一反三
【单选题】One of the ways that Sequoyah copied from the white man is the way of ______.
A.
writing down the spoken language
B.
making word pictures
C.
teaching his people reading
D.
printing their own newspaper
【简答题】One day an old man went into a cafeteria (自助餐厅) to eat in America for the first time. He sat down at an empty table and waited for 43 to take his order. Of course nobody did. Finally, a woman with a p...
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