book. cook.good.foot.zoo.moon.look.food.boot.pool哪个是长音,哪个是短音?

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book. cook.good.foot.zoo.moon.look.food.boot.pool哪个是长音,哪个是短音?

book. cook.good.foot.zoo.moon.look.food.boot.pool哪个是长音,哪个是短音?
book. cook.good.foot.zoo.moon.look.food.boot.pool哪个是长音,哪个是短音?

book. cook.good.foot.zoo.moon.look.food.boot.pool哪个是长音,哪个是短音?
book,cook,good,foot,look是短音
zoo,moon,food,boot,pool是长音.