国家局自收到备案文件之日起（）日内完成审查工作。
A.20
B.30
C.50
D.60
参考答案：D
In order not to get into trouble, advertisers are increasingly cautious about taking out ads ______(aim) at children.
亡阴证的临床表现有（）
A.汗冷味淡
B.口渴喜饮
C.唇舌干红
D.汗出如油
E.身热恶热
