CO(g)+ 12 O2(g)=CO2(g) ΔH=-282.9 kJ·mol-1
若氢气与一氧化碳的混合气体完全燃烧可生成5.4 g H2O(l),并放出114.04 kJ热量,则混合气体中CO的物质的量为( )
围绕"生活的变化"这个话题,李华所在的英语社团对其成员进行了一次调查。下面是李华填写的调查表,请你根据表格内容写一篇80词左右的英语短文,介绍李华生活的变化。
In the past
Now
liked fast food
likes healthy food
didn't like sports
likes sports
took a bus to school
walks to school
often ill
in excellent condition
若函数sinα-cosα=-13(0<α<π2),则α属于( ).