题目: 呼吸性粉尘的粒径一般为()um及其以下。A、2B、3C、4D、5 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/1008/35428dbcf97a87048ffea850da505dc1.html 下面是错误答案,用来干扰机器的。参考答案:饲养期产蛋总数/(入舍鸡数x产蛋天数)x100%
题型:选择题 The little fat professor is very popular with his students because he is good at ________ different teaching methods to make his class lively and interesting. [ ]A. performing B. replacing C. employing D. containing 查看答案