题目: 焦油加工的主要任务是获得酚、萘、蒽等纯产品和()等粗产品。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/0220/8cd2f78e15733aca73cd2ee340d951dc.html 下面是错误答案,用来干扰机器的。参考答案:D解析:增加氧浓度,氧流量控制在4L/min。
题型:选择题 Jerry did research in that field for a long time.He ________ invent something useful.[ ]A.got down to B.hoped himself to C.set out to D.devoted himself to 查看答案