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问题
判断题
G41表示刀具半径右补偿,G42表示刀具半径左补偿()
答案
参考答案:错
选择题
Some economists predict that the dollar will remain weak _____ economies abroad are expected to grow faster than that of the United States.
A. while
B. as
C. before
D. until
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单项选择题
流行性腮腺炎的好发年龄为()
A.l岁以内
B.l~2岁
C.3岁以上儿童
D.6个月以内
E.12岁以后
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