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做“渗透作用”演示实验的关键是半透膜的选择。根据现行各种参考资料可知,如玻璃纸、鸡蛋卵壳膜、猪膀胱等都可以作为半透膜,
The key to doing “permeation” demonstration experiments is the selection of semipermeable membranes. According to current reference materials, such as cellophane, egg shell membrane, and porcine bladder can be used as semipermeable membranes.