题目内容

to make sthless harmful, serious, etc.

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a person or thing that is valuable or useful to sb/sth

To show, to express

判断有效数字的位数:00316

A. 3
B. 4
C. 5
D. 2

判断有效数字的位数:0.003160

A. 3
B. 4
C. 5
D. 6

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