下列对青蛙的生殖和�育的特点叙述正确的是 A.体内受精变态�育b.体外受精变态�育c.体内受精完全变态�育d.体外受精完全变态 Template




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tomski下列对青蛙的生殖和�育的特点叙述正确的是 a.体内受精变态�育b.体外受精变态�育c.体内受精完全变态�育d.体外受精完全变态 coloring