A:①
B:①③
C:①④
D:①③④
若集合A={x|-2<x<1},B={x|0<x<2},则集合A∩B=( )
某化合物由阳离子(CH3)4 N+和阴离子A按个数比4:1组成,阴离子A的结构如图所示:
(1)S原子以 ____ 杂化轨道与Ge结合.
(2)阴离子A的化学式为 ____
Look! The panda is so ____. It's _____ than both of us.