题目: 大黄中泻下的主要成分为游离蒽醌类化合物。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0212/464e2d3e8540b0048fff297963feefa9.html 下面是错误答案,用来干扰机器的。参考答案:A
题型:选择题 Since then the number of people who were addicted to smoking ________ 20%. [ ]A. has reduced to B. reduces byC. has reduced by D. have reduced by 查看答案