A:746和764
B:760和760
C:762和762
D:4和4
下列各组词语中有错别字的一项是( )
可以证明乙酸是弱酸的事实是( )
Since our research so far has not produced any answers to this problem,we need to adopt a different________to doing it.
一个圆的周长是24π,那么这个圆的直径是____cm,它的面积是____π cm2 。