《素问·脉要精微论》辨五色“不欲”的表现是（）
A.地苍
B.蓝
C.黄土
D.重漆色
E.如白裹朱
参考答案：A, B, C
叶片与外界进行气体交换的门户是：[ ]
A．气孔
B．叶脉
C．海绵层
D．栅栏层
_______ you get on well with a number of people, you are usually friends with only a few.
A．Since
B． As
C． While
D．Even
