A:didn’t ear
B:don’t ear
C:hadn’t earned
D:haven’t earned
选项
A
B
C
D
滤液中的溶质
NaOH、Na2CO3
Na2CO3
NaOH、Ca(OH)2
NaOH
滤渣
CaCO3、Ca(OH)2
CaCO3
Ca(OH)2
The only way to succeed at the highest level is to have total belief you are better than anyone else on the sports field.