城市与乡村的首要差别主要体现在(  )的集中程度上。

城市与乡村的首要差别主要体现在(  )的集中程度上。

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The doctor recommends that those who have the illness take t

The doctor recommends that those who have the illness take these pills to_______

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省域城镇体系规划的核心内容包括(  )。

省域城镇体系规划的核心内容包括(  )。

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I had to earn a lot of money__________I could buy my childre

I had to earn a lot of money__________I could buy my children nice clothes andto

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混凝土中对建筑用砂的质量要求有(  )。

混凝土中对建筑用砂的质量要求有(  )。

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