题目内容

My favourite class ______ English.

A. is
B. being
C. like
D. go

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I ________ crazy about ________ basketball.

A. are; playing
B. am; play
C. am; playing
D. is; playing

15P原子的基态为()

A. 1S0
B. 2S1/2
C. 3P0
D. 4S3/2

氩(Z=18)原子基态的电子组态及原子态是:

A. 1s22s22p63p81S0
B. 1s22s22p62p63d83P0
C. 1s22s22p63s23p61S0
D. 1s22s22p63p43d22D1/2

随机抽取一个n=50的样本,计算得到x-bar=60,s=15,要检验假设H0:μ=65,H1:μ≠65,检验的统计量为

A. -3.33
B. 3.33
C. -2.36
D. 2.36

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