溴隐亭的作用机理是:
A.抑制多巴脱羧酶
B.抑制单胺氧化酶
C.激动DA受体
D.阻断中枢胆碱受体
E.促使纹状体残存的DA能神经元释放DA
参考答案:C
-A number of volunteers_______ willing to teach in China's rural(农村的) areas.
-Yes, the number is getting_______
A.is; bigger and bigger
B.are; bigger and bigger
C.is; more and more
D.are; more and more
小肝癌的概念是癌肿直径不超过()
A.1cm
B.3cm
C.6cm
D.9cm