图书馆是通过文献交流来促进社会知识交流的机构，具有（）职能。
参考答案：情报和教育
—Don't try to _______anything from me , Mary.
—I know nothing about it, Mum! I was sleeping at that time.[ ]
A. hear
B. cheat
C. get
D. hide
灭生性除草剂
