A. What's the matter?
B. It's red and white.
C. Yes, it is! Thank you.
A: ____
B: I can't find my ball.
A: What colour is your ball?
B: ____
A: Look! Is this your ball?
中国是个多民族的大家庭,以汉族为主体,占92%,其他少数民族主要分布在边疆地区,集中在( )
下列不属于地图三要素的是( )
下列反射活动中,属于通过长期生活经验积累而形成的是( )