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Section BDirections: There are 2 passages in this section. Each passage is followed by som..
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A.To impose restrictions on further immigration.B.To improve the working conditions of..
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关于慢性非传染性疾病的描述正确的是..
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A.They might lose control of their members because of the increase in immigration.B.Th..
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A.They had lost their jobs as a result of the Industrial Revolution.B.They had been su..
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在队列研究中,暴露的选择来源通常有:..
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