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【判断题】
好氧活性污泥的净化作用有类似于水处理工程中混凝剂的作用，同时又能吸收和分解水中溶解性污染物。A.
正确
B.
错误
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举一反三
【单选题】As second-hand smoking is more harmful and dangerous, people want a total _____against smoking in public．
A.
ban
B.
brake
C.
breakthrough
D.
boundary
【简答题】To quit smoking for good, you should take ZYBAN for
【简答题】某乡有5000农户，按随机原则重复抽取100户调查，得平均每户年纯收入12000元，标准差2000元。 要求：(1)以95%的概率(t=1.96)估计全乡平均每户年纯收入的区间。 (2)以同样概率估计全乡农户年纯收入总额的区间范围。
【简答题】To quit smoking for good，you should take ZYBAN _____________．
【简答题】People should abstain from tobacco smoking because ______.
【简答题】C How has smoking been controlled in recent years? People were asked to stop smoking in a range of public places—such as doctors’ surgeries, cinemas, theatres and churches—over the second half of the ...
【简答题】You should ______ smoking (你应该戒烟).
【简答题】某乡有5000农户,按随机原则重复抽取100户调查,得平均每户年纯收入12000元,标准差2000元。要求按95%的置信度(Z=1.96)估计: (1)平均每户年纯收入的抽样平均误差为___元。 (2)全乡平均每户年纯收入区间为___元到___元。 (3)全乡农户年纯收入总额的区间为___万元到___万元。 注:计算结果取整数。
【简答题】There should be laws that prohibit smoking around children.
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