18.根据所学知识回答1在观察蚯蚓的实验中要保持蚯蚓体表的湿润其原因是靠湿润的体壁�吸.2与家兔相比蚯蚓不能快速运动的原因是 Template




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tomski18.根据所学知识回答1在观察蚯蚓的实验中要保持蚯蚓体表的湿润其原因是靠湿润的体壁�吸.2与家兔相比蚯蚓不能快速运动的原因是 coloring