题目内容
mark A on B --- 在A上标记B
查看答案
搜索结果不匹配？点我反馈
更多问题
D: Mr. Wood, I 1 that you have some special packing requirements for your order.J: Yes, we do. First of all, we would like the2 to be wrapped in some type of 3 .D: Ok. That's standard for all our board.J: Can you also wrap them in 4 instead of the 5 ?D: That's no problem, but there will be a small 6 .J: That's acceptable. Also, we want to make sure that strong boxes are used outside to protect the boards inside.D: We'll take care of that. Anything else?J: Yes. Mark " 7 " on the cartons.
热过滤滤纸在使用时( )
减压抽滤时，修剪的滤纸应比布氏漏斗内径略大，以防止溶液不经过滤，直接漏入吸滤瓶中。
停止减压过滤或需用溶剂洗涤晶体时，应先关闭水泵，再将吸滤瓶侧管上的橡皮管拔开。
微信支付 
支付宝支付