具有明显镇痛作用的药物是
A.丹参B.川芎C.莪术D.延胡索E.桃仁
参考答案:D
解析:延胡索镇痛作用较吗啡弱但优于复方阿司匹林,对钝痛的作用优于锐痛,不良反应少,无成瘾性。
听句子,缩写原文。()
A.My friends try to persuade me to invest in the stock market.
B.My friends talk a lot about investing in the stock market.
C.My friends say that investing in the stock market is crazy.
D.My friends and I have different opinions about the stock market.
叶中脉的韧皮部靠近下表皮,木质部靠近上表皮。