下列各项属于公民应履行的法定义务的有 [ ]
①遵守公共秩序
②尊重社会公德
③爱护公共财产
④积极见义勇为
A.①②③④
B.①②③
C.②③④
D.①②④
答案:B
对于区别药物性黄染与黄疸最有意义的部位是()
A.手掌
B.皮肤
C.巩膜
D.口腔黏膜
E.角膜
The water of the lake was so________that it looked like glass.[ ]
A. silent
B. calm
C. still
D. quiet