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试验用5种植物分3组;甲组于4月18日用10ppm萘乙酸浸24小时后放入冰箱(3℃)两天;乙组水浸24小时低温处理(3℃)两天;丙组水浸24小时
The test was divided into 3 groups with 5 kinds of plants; Group A was immersed in refrigerator (3 ℃) for 24 hours with 10ppm naphthalene acetic acid on April 18 for two days; Group B was immersed in water for 24 hours and treated at low temperature (3 ℃) for two days; Group immersed for 24 hours