雌雄蛙抱对时进行体内受精 答案× 分析青蛙的卵是体外受精抱对是青蛙产卵和排精时的行为抱对时雌雄蛙的泄殖腔孔相互接�有利于精液 Template




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tomski雌雄蛙抱对时进行体内受精 答案× 分析青蛙的卵是体外受精抱对是青蛙产卵和排精时的行为抱对时雌雄蛙的泄殖腔孔相互接�有利于精液 coloring