产生天癸的主要物质是()。
A.肾中之精气
B.肾阳之温煦
C.肾阴之濡润
D.肾之封藏
E.元气之充足
参考答案:A
下图是人体内的几种已分化的细胞,其中能形成上皮组织的是( )
A.
B.
C.
D.
Robots are _______ to do the same things _______ people. [ ]
A. enough clever; as
B. clever enough; with
C. clever enough; as