最早的小儿推拿专题文献出现在（）
A.《小儿推拿秘诀》
B.《小儿药证直诀》
C.《医门秘旨》
D.《补要袖珍小儿方论》
参考答案：D
Countries in Southeast Asia have ________ become familiar with Chinese brands, but there is still a long way to go.[ ]
A. instantly
B. gradually
C. actually
D. frequently
20世纪50年代日本发生的水俣病，是因为居民长期食用富含下列哪种元素的鱼虾所致 [ ]
A．汞
B．镉
C．铁
D．锌
