下列化学实验基本操作正确的是 A 给试管中的固体加热时管口应略微�下倾斜 b 称量固体时砝码应放在天平左边托盘上 C 用镊子取 Template




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tomski下列化学实验基本操作正确的是 a 给试管中的固体加热时管口应略微�下倾斜 coloring