哪一脏的气机运动有升降，有出入？（）
A.心
B.肺
C.脾
D.肝
参考答案：B
— This dress is too expensive.
— You can look at that one. That one is much _____. [ ]
A. cheap
B. expensive
C. pretty
分析软件危机产生的主要原因有哪些？
