下列传染病中,病后可获得持久免疫力的有()
A.麻疹
B.百日咳
C.细菌性痢疾
D.蛔虫病
E.水痘
参考答案:A, B, E
小年龄的幼儿经常分不清想象和现实,成人不要误认为他是在()
A.说谎
B.说笑
C.做梦
We need lots of________food every day. [ ]
A. interesting
B. boring
C. healthy
D. nice