下列化肥不属于氮肥的是( )
A:NH4NO3
B:CO(NH2)2
C:NH3•H2O
D:K2SO4
—Who do you want to talk with at the end of the speech?—The man_________ Mr White.
阅读图,回答下题.
What ____ ( happen)to your head, Daming?
《舌尖上的中国 2》的热播,再次引发了人们对美食的关注。距今约五六千年的半坡原始居民食物种类已大大丰常,有主食,还有副食。他们的主食是( )