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化学课外研究小组活动,可以结合教材内容,自己晒洗棕色像片,是很有意义的。用具:冲洗盘,或者装药用的小盘子:简单的暗室。
Chemistry extra-curricular research group activities, textbooks can be combined with their own tanning brown photos, is of great significance. Utensils: Flushing plates, or small plates for charging: Simple darkroom.