Winter is over, the weather is ____________.[ ]
A. hot
B. warm
C. cold
答案:B
2,4,0,-16,-50,( )
A.-104
B.-108
C.-125
D.-128
喷他佐辛(镇痛新)与吗啡比较,下列哪项是错误的()
A.镇痛新镇痛效力较吗啡弱
B.镇痛新呼吸抑制较吗啡弱
C.镇痛新大剂量可致血压升高
D.镇痛新成瘾性与吗啡相似
E.既具有阿片受体激动剂作用又有弱的拮抗作用