A:which you showed
B:you showed him
C:you showed
D:where you showed
____?
()后面藏着几?
13-(____)=5 14-(____)=6 (____)-5=9 11-(____)=7
古诗云:“才从塞北踏冰雪,又向江南看杏花。”从地理学的角度看,这首诗描述的是( )
酵母菌与细菌相比,在结构上的主要不同是 ( )