将甲醇洗系统洗涤甲醇冷至-71.7℃,主要是依靠() A.流体节流 B.氨冷器冷却 发布时间:2020-02-24 07:44 │ 来源:www.tikuol.com 题型:单项选择题 问题: 将甲醇洗系统洗涤甲醇冷至-71.7℃,主要是依靠()A.流体节流B.氨冷器冷却C.CO2气体解吸
题型:单项选择题 Mom was usually busy ______ my younger sister during the night and she ______ have less sleep.[ ]A. tending; tended B. tended; tending toC. tending; tended to D. tended to; tending to 查看答案