Copper - containing catalysts are the most suitable catalysts for producing 1, 2 - propanediol through catalytic hydrogenolysis of glycerol.对甘油催化氢解制取1, 2- 丙二醇效果最好的是含铜的催化剂....
现在的软驱对质量低劣的软盘也能读取。Today's floppy disc drives are tolerant of poor quality discs.质量低劣的组装车可能会有安全隐患。Badly-built kit cars can be death traps.他们很讨厌低劣的工艺品.They have a hatred of bad workmanship....
If It'still is then you've not scrolled up enough lines.如果还在说明你向上滚动的行数不够.Wherever the drop target can possibly be scrolled offscreen, the program needs to auto - scroll.无论拖放的目标对象是否在屏幕之外, 程序都需要自动滚动.I scrolled do...