问题
单项选择题
标准正态分布曲线的特征是（）
A.μ=0，σ=0
B.μ=0，σ=1
C.μ=0，σ=-1
D.μ=1，σ=0
E.μ=1，σ=1
答案
参考答案：B
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标准正态分布曲线的特征是（）
A.μ=0，σ=0
B.μ=0，σ=1
C.μ=0，σ=-1
D.μ=1，σ=0
E.μ=1，σ=1
参考答案：B
A king was old and he knew it was time to choose a new king. He told all the young people in the country,” I’ll give of you a seed(种子). Plant it and bring it back one year later. Show me the plant that you bring, I’ll choose a new king from you. A boy _Ling got a seed, too. He planted it . But the seed didn’t grow at all. A year later, Ling had to take his box to the palace . Others all brought beautiful plants there and Ling felt . The king the palace and looked around. When he found there was nothing in Ling’s box. The king smiled and said to the others, “ One year ago, I gave everyone a seed couldn’t grow. But all of you, except Ling, have brought me plants and flowers. Ling was the only one the honesty(诚实) and courage(勇气)to bring a box. So he will be the new king.”
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