已知 2x=3y=10, 那么 12xy=?
将一批树苗种在应该正方形花园边上,四角都种,如果每隔 3 米种一棵,那么剩下10课树苗 ,如果每隔 2 米种一棵那么种满正方形的 3 条边 ,则这批树苗有 ( ) 棵
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设正方形的边长为x,由已知可得方程4x/3+10=3x/2+1,求解得x=54故树苗有(54x4)/3+10=82,选D。
The little girl is ignorant _____ the basic rules of English grammar。
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In most countries, the metric system has been _____ for all measurement.
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Edison tested more than one thousand materials to see if they could _____ electric ; current and glow.
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How can you _____ and watch the country go to ruin?
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To begin some activity is to _____ doing it.
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You've only got a slight cold. You'll _____ it in a day or two.
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He read the story _____ - for everybody present to hear.
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He is very _____ and well-qualified, so he should reach the top of this profession.
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The manager gave her his _____ that the complaint would be investigated.