The new tax made it necessary to mark up all the goods in the shop.新税迫使商店所有的货都涨价.What will your mark - up be on the Boss, 3, 3.5, 4?你在“大老板”上的毛利是多少, 3, 3.5, 4?One day George offered to take Mark up in his plane.有一天乔治邀请马克坐...
After setting, the surfaces of the specimens are ground down using carborundum and alumina.凝固之后, 样品表面连续用金钢砂或氧化铝磨平.Activated carbon, alumina are often used to remove many types of organic materials from aqueous streams.常用...