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【单选题】
关于t 分布,下列叙述 错误 的是A.
当 n 趋于 ¥ 时，标准正态分布是t分布的特例
B.
当 n 逐渐增大，t分布逐渐逼近标准正态分布
C.
n 越小，则t分布的尾部越高
D.
t 分布是一条以 n 为中心左右对称的曲线
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举一反三
【单选题】Everyone wants to be healthy and happy.【C1】______ , illness or accidents may occur without any【C2】______ . Frequently the person who is【C3】______ can be cared for at home if there is someone【C4】______...
A.
Apparently
B.
Unfortunately
C.
Naturally
D.
Occasionally
【单选题】Which of the following statements is NOT TRUE about “The Glass Mountain”?
A.
The story concludes with a happy ending.
B.
It shows no trace of anything heroic or romantic.
C.
The author presents a picture of an absurd man doing absurd things.
D.
It refuses to follow the story line of an existing fairy tale.
【单选题】Everyone wants to be healthy and happy.【C1】______, illness or accidents may occur without any【C2】______. Frequently the person who is【C3】______can be cared for at home if there is someone【C4】______of ...
A.
Occasionally
B.
Unfortunately
C.
Actually
D.
Naturally
【简答题】Cultural notes Ren shan ren hai, which can be literally translated to “people mountain people sea,” means “huge crowd of people”. The idiom people mountain people sea, an example of Chinglish, is wide...
【单选题】Everyone wants to be healthy and happy.【C1】______, ill ness or accidents may occur without any【C2】______. Frequently the person who is【C3】______can be cared for at home if there is someone【C4】______of...
A.
Occasionally
B.
Unfortunately
C.
Miserably
D.
Naturally
【单选题】用手动真空泵或吸气方法对真空点火提前装置施加一定真空，正时灯照射下，正时记号应向提前方向偏移，否则应检查（）。
A.
点火间隙
B.
真空点火提前装置
C.
高压线火花
D.
火花塞跳火
【单选题】Which is acclaimed as No. 1 Mountain of the Wuyue (the Five Sacred Mountains)?
A.
Mount Taishan
B.
Mount Huangshan
C.
Mout Huashan
D.
Mount Songshan
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