简述提高塑性的主要途径。
参考答案:
(1)控制金属的化学成份;
(2)控制金属的组织结构;
(3)选择适当的变形温度-速度条件;
(4)选择合适的应力状态。
把下列句中汉语部分译成英语,并注意使用正确形式.(5分)
小题1:Welcome to Kunming! We will go out of our way to make you ______________(让你们感到宾至如归).
小题2:He was ___________(生气) himself for making so many mistakes in his homework.
小题3:To get here for Christmas is a dream that has _____________ ____________(实现).
小题4:Some of us know little about _____________ (餐桌礼仪).
小题5:He had ________________________(用完) his money before he went back home.
( )对本岗位的安全生产负直接责任。
A.班组长
B.岗位工人
C.主要负责人
D.职能机构人员