A:2
B:
C:
D:
You can see a wide r____ of animals in the newly built zoo.
下列加横线的字注音或字形没有错误的一项( )
I usually go to school by bike, today I took a bus because it rained heavily.
假设一:红色固体只有Cu
假设二:红色固体只有Cu2O
假设三:红色固体中有Cu和Cu2O
请回答有关问题.