单项选择题

For brasses, tin is the predominant alloying elements as substitutional impurity.

A.正确
B.错误
<上一题 目录 下一题>
热门 试题

单项选择题
Cast iron is the most widely used engineering material, and also the most recycled of all materials
A.正确
B.错误
单项选择题
According to carbon content, the steels are classified into low-carbon, medium-carbon, and high-carbon types.
A.正确
B.错误
相关试题