汞中毒疗效佳的解毒药是().
A.二巯丁二钠
B.二巯基丙醇
C.青霉胺
D.亚甲蓝
E.硫代硫酸钠
参考答案:B
Beijing, the capital of China, is one of _____ cities in the world.[ ]
A. the biggest
B. bigger
C. much bigger
D. big
北京菜的代表菜有盐水鸭。