从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。()
A.
B.
C.
D.
参考答案:D
有关抗精神病药物作用机制是()
A.主要通过阻断脑内多巴胺和5-羟色胺受体
B.阻断的受体越多效果越好
C.传统抗精神病药物主要阻断D2、M1和H1受体
D.典型抗精神病药物对D2受体有明显阻断作用
E.对脑内某些受体阻断可产生一些不良反应
—Where's Mike? I haven't seen him for a week.
—He _____ to Hong Kong and he'll be back soon.
A. is going
B. has gone
C. has been
D. went