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【单选题】
过椭球面上一点的一个与该点子午面相垂直的法截面与椭球面相截形成的闭合圈称为 ________ 。A.
卯酉圈
B.
子午圈
C.
平行圈
D.
大地线
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反馈参考答案：
举一反三
【单选题】If a prediction based on a hypothesis is fulfilled, then the hypothesis is confirmed as true.
A.
YES
B.
NO
C.
NOT GIVEN
【单选题】Regarding null hypothesis and alternative hypothesis , which one is wrong ( ).
A.
generally，a null hypothesis state that there’s no difference between the two populations.
B.
null hypothesis and alternative hypothesis are mutually exclusive, and only one can be true.
C.
the alternative hypothesis is effectively the opposite of a null hypothesis
D.
the two hypotheses are certain hypotheses for the sample
E.
the two hypotheses are certain hypotheses for the population
【简答题】试辨认分类编址方式中以下 IP 地址的网络类别
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