在以下常用的热处理方法中,经哪种方法处理后可以使钢材的硬度大大提高(). A.回火 发布时间:2019-04-11 04:44 │ 来源:www.tikuol.com 题型:单项选择题 问题: 在以下常用的热处理方法中,经哪种方法处理后可以使钢材的硬度大大提高().A.回火 B.退火 C.淬火 D.正火
题型:单项选择题 What did the Spanish government do to help its injured citizens a. It sent them back to Spain. b. It had constant phone contact with the Spanish Consul in Istanbul. c. It treated them in Spanish hospitals in Istanbul. d. It took care of their necessities. 查看答案