Tom and Mary have the same grandfparents. But they don't have the same (相同的) parents.

So Tom is Mary's ______. [ ]

A. cousin

B. brother

C. uncle

林业带（）.

A.从事林业产品生产

B.谷物种植带

C.采用轮作物制

D.生产不易运输和易腐视频