严格控制南平征占用（）林地，加强对未批先占、少批多占、不批乱占林地案件的查处，减少林地的非法流失。
A.生态公益
B.人工种植
C.原始生态
参考答案：A
The reporter said that the UFO________ to the tall building when he saw it. [ ]
A. was traveling
B. traveled
C. had been traveling
D. has traveled
什么是主存储器和外存储器？
