答案：C
The number of the cranes is getting ______. If we don't help them, they will disappear ______ a few years. [ ]
A. fewer and fewer; in
B. larger and larger; after
C. more and more; after
D. smaller and smaller; in
通过媒体搜集公开发布的有关资料，为项目设计与决策提供详实的辅助资料的调查方法为______。
A．历史资料调查 B．现场调查C．文案调查 D．访谈调查
