为探究某物质对草履虫的刺激是有利还是有害张刚同学做了如下的实验.请回答下列问题.1在载玻片一端滴一滴草履虫培养液另一端滴一滴清水.用 Template




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tomski为探究某物质对草履虫的刺激是有利还是有害张刚同学做了如下的实验.请回答下列问题.1在载玻片一端滴一滴草履虫培养液另一端滴一滴清水.用 coloring