_______ of the area _______ covered by trees.
A:Two-third; is
B:Two thirds; is
C:Two-third; are
D:Two thirds; are
已知∠A=100°,那么∠A补角为____度.
某小学食堂有864千克大米,原计划吃8天,实际比原计划每天少吃36千克.实际多少天吃完?
在探究生物的遗传物质和遗传规律的漫长岁月中,众多的学者做出了卓越的贡献,其中正确的是