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【简答题】
求方程x 2 +x=tan 2 t的通解。
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反馈参考答案：
举一反三
【简答题】下列影响传染病流行过程的因素中，属于自然因素的是
【简答题】内部犯罪预防的工作机制一般包括组织指挥、预防力量和预防措施三个系统。
【单选题】They hoped to find a new continent _____ in the Indian or Pacific Ocean. [ ]
A.
which they thought was existed
B.
where they thought existed
C.
where they thought to be existed
D.
which they thought existed
【单选题】estions 3 and 4 are based on the news report you have just heard .
A.
) People were concerned about the number of bees .
B.
) Several cases of Zika disease had been identified .
C.
) Two million bees were infected with disease .
D.
) Zika virus had destroyed some bee farms .
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