钻床夹具中,对于在一道工序内需要连续加工的孔,应采用
A.固定钻套
B.特殊钻套
C.快换钻套
D.导向钻套
正确答案是D
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Write a composition on the ANSWER SHEET in about 150 words, basing yourself on one of the texts you have learned.
TOPIC: In what way is overindulgence of children harmful? The text you should base your composition on is