A:穿着更舒适
B:饮食更营养
C:出行更便捷
D:环境更污染
X
Y
Z
A
Fe
FeCl2
Fe2O3
B
Ca(OH)2
NaOH
NaCl
C
AgNO3
Ba(NO3)2
BaSO4
D
H2O
O2
CO2
— is it from Suqian to Jiuzhai Valley?
—About l,900 kilometers away. But I'm not sure.
—Yes.there are.