用镍基铸铁焊条进行铸铁电弧冷焊时，不会产生热裂纹。
参考答案：错
At the 1904 0lympics, _____ began to compete. [ ]
A. woman divers
B. women divers
C. women diver
D. women's divers
树种组划分为几个组？
