Fred ________ many football boots. But this pair of boots ________ the nicest.
A:has, are
B:has, is
C:there are, are
D:there are, is
观察下图,请回答:
(1)图片上的是什么军队在做什么?(2)他们出兵的目的是什么?
如图是某流域水量收支平衡示意图(单位:亿吨).读图,回答下题.