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问题
判断题
肺结核病是由人感染腺病毒而引起的呼吸道传染病。
答案
参考答案：
错
选择题
In those days, large numbers of poor farmers moved to the northeast with their families as they thought they might be a little _____ there.
A. well off
B. better off
C. good off
D. best off
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问答题 简答题
金属材料的防腐有何意义？
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