A:It
B:A
C:That
D:What
生物实验中常常需要设置对照,以下对照设置正确的是( )
下列各项中字形完全正确的一项是( )
生物细胞内主要的遗传物质是( )
—Does the young man standing there ________ the company?
—No, the company is ________ his father.