It is often said that _______famers lead _______very hard but simple life.

A．/; /

B．/; a

C．the; /

D．the; a

氯丙嗪的不良反应有（）

A.中枢抑制症状

B.视力模糊

C.直立性低血压

D.锥体外系反应

E.药源性精神异常