人之所以能视万物是由于
A.肝受血而能视
B.脾主运化,主肌肉,胃受纳五谷
C.肺气肃降,水道畅通,膀胱气化如常
D.肝血畅旺,清阳之气出上窍
E.心主神明,目为心之使
参考答案:A,E
冰在转变成水时,净密度(),当继续升温至()时密度可达到(),继续升温密度逐渐()。
The minimum supply price, the lowest price at which a producer is willing to supply an additional unit of a good, is:()
A. less than the marginal revenue for the additional unit.
B. the price at which producer surplus is maximized.
C. the marginal cost of producing the additional unit.