下列关于基因的描述，正确的是( )
如图表示大气的受热过程，序号分别表示各种辐射作用．读图，完成下题．
As well as ________ all his homework, he helped his mother with a good cleaning around the house.
设a,b为两条直线，α,β为两个平面，下列四个命题中真命题是 （ ）
