题干
—Hi. Who's that ?
—Hello. ____ .
A：This is LiMing speaking .
B：I'm LiMing .
C：That is LiMing speaking .
答案(点此获取答案解析）
A
2MoO3 + 4SO2； ②MoO3 + 2N
H3·H2O = (NH4)2MoO4 + H2O；
MoO3 + H2O；