单项选择题常规水蒸气蒸馏的操作温度为( ) A、挥发性组分的沸点 B、100℃左右 C、常温 D、200℃左右
单项选择题2) This movie this Friday. A. shows B. will show C. is to be shown D. is to show A、shows B、will show C、 is to be shown D、 is to show