The text is written mainly for those_____________.

The text is written mainly for those_____________.A．who go to work earlyB．who want to lose weightC．wh

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The CDs are on sale! Buy one and you get completely free.

The CDs are on sale! Buy one and you get completely free.A. other B. others C. one D. ones

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Jenny nearly missed the flight doing too much shopping.

Jenny nearly missed the flight doing too much shopping.A. as a result of B. on top of C. in front of

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古代有“闽人以海为田”之说,这种说法突出反映了福建人

古代有“闽人以海为田”之说，这种说法突出反映了福建人A．临海而居的居住方式B．围海造田的生产方式C．靠海谋生的生存方式D．四海为家的生活方式

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下面是一篇科技论文的摘要,根据其信息内容提取四个关键词。(4分)本文针对直接法和二步法合成聚

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