【单选题】 As indicated in the passage, the water problem ______.
A.has been exaggerated by some experts in the field
B.is underestimated by government organizations at different levels
C.poses a challenge to the technology of building reservoirs
D.is already serious in certain parts of the world.
网考网参考答案:D
网考网解析:
依据为文章第一行起相关内容。
查看试题解析出处>>
发布评论 查看全部评论