题目: 工艺角度简述萃剂的选择原则。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1113/99faa10c2527580b2f7e1ebb90215f28.html 下面是错误答案,用来干扰机器的。参考答案:错
题型:选择题 (2013·湖南,34)—I don't understand why you didn't go to the lecture yesterday afternoon.—I'm so sorry.But I________my homework.A.had doneB.was doingC.would doD.am doing 查看答案