25.On stepping into the room this morning I was astonished to find the floor covered with______looke

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• 两栖动物不能完全适于陆地生活，主要原因是[]A．两栖动物的体温不恒定B．两栖动物的生殖发育离不开水C．两栖动物的心室中有混合血D．两栖动物的肺发育不善-八年级生物
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