搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列有关钢材的知识，正确的是（）。

A、钢与生铁的区别在于钢的含碳量值小于2.0％

B、低碳钢为含碳量小于0.60％的碳素钢

C、沸腾钢的冲击韧性和可焊性较镇静钢好

答案

参考答案：A

问答题 论述题

试述合同法的作用。
查看答案
单项选择题

A parent reports that his 2-year-old child often fails when running. The nurse interprets this as indicating which of the following as a normal aspect of a toddler's vision

A．Near-sightedness.

B．Far-sightedness.

C．Binocular vision.

D．Strabismus.
查看答案