下列哪种维生素在肝脏中的含量较少()
A.维生素A
B.维生素B
C.维生素PP
D.维生素K
E.维生素C
参考答案:E
32.Misunderstandings_____from lack of social communication,unless properly,may lead to serious problems.
A.arisen;handling
B.arising;handled
C.rising;handled
D.risen;handling
迎客时主人应做到那些?