题目内容
大样本分组资料计算生存率用：（）
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Unfortunately, we now have plenty of evide____ that many children do notdo half as well on tests as they actually could if they tried.
A foreigner’s first ____ of the US is likely to be that everyone is in a rush—often under pressure.
The small country was destroyed by ten years of ____ fighting.
The ____ with the most votes (选票) will be elected president of the association, whether he or she wins more than half the votes or not.
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