痔应与下列哪些疾病鉴别
A.肛裂
B.直肠癌
C.直肠息肉
D.肛窦炎
E.恶性黑色素瘤
参考答案:B,C,E
食品安全与人类健康密切相关,食用下列食品不会影响人体健康的是( )
A.含“塑化剂”的果汁
B.用甲醛浸泡的海产品
C.鲜奶中添加“三聚氰胺”
D.用碳酸氢钠做发泡剂的蛋糕
Traffic restrictions have come into effect in Beijing _____ to improve the capital’s air quality
and traffic situation for the 2008 Olympics. [ ]
A. in order that
B. in an attempt
C. at an attempt
D. in a try