请帮忙翻译下问题及每个选项的意思,谢谢In order to separate the salt and water,we use the kerosence lamp to heat evaporating dish,the following statement( )is false.A,Note that the safety of using of alcohol lampB.Put out the alcoho
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请帮忙翻译下问题及每个选项的意思,谢谢In order to separate the salt and water,we use the kerosence lamp to heat evaporating dish,the following statement( )is false.A,Note that the safety of using of alcohol lampB.Put out the alcoho
请帮忙翻译下问题及每个选项的意思,谢谢
In order to separate the salt and water,we use the kerosence lamp to heat evaporating dish,the following statement( )is false.
A,Note that the safety of using of alcohol lamp
B.Put out the alcohol lamp before the salt brine are not completely evaporated
C,The salt particles are very small in Evaporating dish.
D,After heating the evaporating dish put it on the desktop by hand immediately
请帮忙翻译下问题及每个选项的意思,谢谢In order to separate the salt and water,we use the kerosence lamp to heat evaporating dish,the following statement( )is false.A,Note that the safety of using of alcohol lampB.Put out the alcoho
为把盐和水分离,我们用石蜡灯加热盘子使之蒸发,下列陈述不对的是
A标明酒精灯使用的注意事项
B在盐水没有完全蒸发的时候熄灭酒精灯
C盐颗粒在蒸发盘中很小
D加热完蒸发盘后,马上用手把它放在桌上
肯定选D,没有什么加热试验可以一做完就用手收拾的,会烫伤.
为了分开盐和水，我们用煤油灯加热蒸发皿，一下陈述错的是（）
A 注意安全使用酒精灯
B 在盐水没有完全蒸发时熄灭酒精灯
C 蒸发皿上盐的颗粒非常小
D 在加热蒸发皿后，立即用手把它放在桌面上