岑参的《白雪歌送武判官归京》中从视觉角度看，色彩鲜明，红白映衬的两句诗是：____，____。

构建模式图，探究地理基本原理、过程、成因及规律，是学习地理的方法之一．读下图，回答下题．

① What are you doing? ____     A. No，she isn't.

② What is your mum doing? ____     B. Yes I am.

③ Can I use your pen? ____     C. I'm cleaning my room.

④ Is Sarah reading a book? ____     D. She is cooking fish.

⑤ Are yoy doing homework? ____     E. Sure.

蚯蚓活动的地方土壤疏松，肥力强；蟑螂滚粪球，草生长旺盛，说明（  ）