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復(fù)數(shù)。morning exercises意思是早操，exercise既是不可數(shù)名詞，又是可數(shù)名詞，例句：You are probably well enough to take a lit

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復(fù)數(shù)。domorning exercises意思是做早操，exercise既是不可數(shù)名詞，又是可數(shù)名詞，例句：You are probably well enough to take