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【单选题】
设 和 是来自态总体 N 的样本均值和样本方差, 样本容量为 ,则 为( )A.
检验假设 的拒绝域
B.
的接受域
C.
的一个置信区间
D.
的一个置信区间
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【简答题】船舶在北印度洋上航行,使用哪种投影方式的天气图最合适?( )投影图
【简答题】阅读短文，回答问题。 When my mother has a birthday, she often has a birthday meal with the whole family. She likes to go to the concerts. My father usually buys concert tickets and they go to the theatre. When ...
【单选题】My father has bought a new bike for me. / My father has bought me a new bike.
A.
主谓双宾
B.
主系表
C.
主谓宾宾补
D.
主谓宾
【单选题】My daughter has a headache and a fever. She appears______a cold．
A.
to has caught
B.
to catch
C.
to have caught
D.
to have been caught
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