胃脘胀满疼痛,嗳气酸腐,不欲食,证属()
A.胃寒
B.气滞
C.食积
D.胃气虚
E.血瘀
参考答案:C
In relation to the law of agency, distinguish agency from a contract for the benefit of a third party. (10 marks)
液压系统中,液压泵是将()的动力装置。
A.压力能转变为机械能
B.电能转化为液体压力能
C.机械能转化为压力能
D.压力能转化为电能