世界上面积最大的高原是( )
A:青藏高原
B:巴西高原
C:伊朗高原
D:东非高原
下列物质中属于纯净物的是()
根据句意及首字母或汉语提示,完成下列单词。 (1)The e____ is the biggest animal on land.(2)The old man p____ trees in spring every year.(3)My hobby is c____ stamps(邮票).(4)It's d____ to play football in the street.(5)Will you i____your teachers to your birthday party?
I crayons.