为了提高疗效,减少副作用,常用的左旋多巴复合剂是()
A.中枢多巴脱羧酶抑制剂
B.多巴胺受体拮抗剂
C.外周多巴脱羧酶抑制剂
D.单胺氧化酶抑制剂
E.胆碱酯酶抑制剂
参考答案:C
Don't keep the door ____! [ ]
A. close
B. open
C. opening
—Could you give us some advice about this competition?
—If you want to win first prize,your design for the museum must be________.[ ]
A. careful
B. obvious
C. clear
D. novel