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1.将称取5 g菠菜叶改成取菠菜叶2～5片(具体取多少视菠菜叶的大小而定,最好由实验教师称量、估算并发放),并且将菠菜叶用手撕碎。
1. Weigh 5 g of spinach leaves and take 2 to 5 spinach leaves (depending on the size of spinach leaves, preferably measured by an experimental teacher, estimated and dispensed), and the spinach leaves are torn off broken.