下列关于我国降水量分布总趋势的叙述,正确的是[ ]
A、从东南沿海向西北内陆递增
B、从东南沿海向西北内陆递减
C、从西南向东北递增
D、从西南向东北递减
答案:B
The children are having fun ____ on the hill.
A. play
B. to play
C. playing
D. played
简要分析见图6-7、图6-8。