计算毛坯图是为长轴类锻件选择制坯工步而假设的一种毛坯图。
查看答案
预锻工步应根据具体情况决定是否采用。
A. 对
B. 错
It's much ____(easy)for you to use a computer if you know English.
It's very ____(consider)of you to look after my garden during my absence.
递归函数f(1)=1,f(n)=f(n-1)+n(n>1)的递归出口是___________。
A. f（1）=1
B. F（1）=0
C. f(0)=0
D. F(n)=n
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