泡沫灭火系统环泵式比例混合器的安装标高的允许偏差为（）。A、±5mm B、±8mm

The Chinese captain was released by Japan finally, __    _nearly a month of detention（扣押）, which has seriously harmed the relationship between the two countries．

A．ended

B．ending

C．to end

D．being ended

已知：A=x³+2x+3，B=2x³-mx+2，计算2A-B的值时发现恰好与x无关，请求出此时m的值及2A-B的值。

________I known what was going to happen, I would never have left her alone.

耙矸机耙装时，对周围施工人员有什么规定？

我国《中小学健康教育基本要求》对小学生的内容要求有：人体解剖生理知识；个人卫生习惯与健康；合理营养与平衡膳食；环境卫生；预防常见病；安全与伤害预防和（）

A、安全与环境教育

B、性教育

C、心理卫生教育

D、体育教育