镜面舌的形成机理是()。
A.水湿上泛
B.胃无生气
C.热盛伤津
D.热入营分
E.胃肠热结
参考答案:B
She went to the bookstore and bought .
A.dozen books
B.dozens books
C.dozen of books
D.dozens of books
下列含氧化合物中含氧量最高的是( )
A.SO2
B.CuO
C.SO3
D.CuSO4