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
<上一题 目录 下一题>
热门 试题

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
单项选择题
毛果芸香碱对眼睛的作用是( )(1.0) A. 缩瞳,升高眼内压,调节痉挛 B. 缩瞳,降低眼内压,调节痉挛 C. 扩瞳,升高眼内压,调节麻痹 D. 扩瞳,降低眼内压,调节麻痹 E. 缩瞳,降低眼内压,调节麻痹
相关试题