大肠中最短但最宽的一段是()
A.盲肠
B.阑尾
C.升结肠
D.降结肠
E.直肠
参考答案:A
能产生天癸的物质是()
A.水谷精微
B.肾精
C.冲任气血
D.命门之火
E.肾阴
Sam and Bill are brothers. But Sam is _______ than Bill. [ ]
A. tall
B. tallest
C. the tallest
D. taller