灰铸铁低温石墨化退火可使()球化和分解析出()。
参考答案:共析渗碳体;石墨
When it comes to consumer society, protest groups are insisting that some of our money ______ to the third world.
A.give
B.should give
C.is given
D.be given
焊缝和热影响区之间的过渡区域是()。
A.兰脆区
B.过热区
C.熔合区
D.不完全重结晶区