肝性脑病的发病机制有许多学说,其中研究最多的是()
A.氨中毒学说
B.假性神经递质学说
C.GABA/BZ复合体学说
D.氨基酸代谢失衡学说
E.以上都不是
参考答案:A
This is a very lovely doll. I’ll buy it _____.
A.how much may it cost
B.no matter how it may cost
C.however much it may cost
D.how may it cost
不属于淋巴器官的结构()。
A.淋巴液
B.胸腺
C.扁桃体
D.脾
E.淋巴结