单选题：Why are people advised not to travel to Mexico ?

题目内容：
Why are people advised not to travel to Mexico ? A．Because it is the most serious area for the outbreak of swine flu．
B．Because a travel ban to the country has been ordered．
C．Because more than 100 cases of swine flu have been reported．
D．The Centers for Disease Control and Prevention forbids doing so．

参考答案：
答案解析：

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分类：公共英语四级  题型：单选题
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与丙谷胺协同用于消化道溃疡的中药是（　）A．白芍 B．茯苓 C．泽泻 D．冰片 E．甘草

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根据以下材料，回答题A．虚中夹实B．由虚转实C．实中夹虚D．由实转虚E．虚虚实实疾病失治或治疗不当，致病邪久留，损伤正气，导致疾病为

分类：公共英语四级  题型：单选题
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