题目: 反渗透背压指膜组件淡水侧压力与进水侧压力的压力差 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0731/0b711efcc49b477efe627bf1d7ecbcfc.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:选择题 I thought my deskmate would be _______ for class, but he was late again. [ ]A. on time B. in time C. at times D. at any time 查看答案