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【简答题】
用单词适当形式填空(每空只填一个单词)。 1. Keeping calm is the most important thing you should remember in time of e_______. 2. Tom d______ to be praised by the boss as he has worked so hard that nobody can imagine. 3. The news of Gaddafi's death was b______ over the radio throughout the world immediately. 4. Ann was very annoyed at his rude b______ at her birthday party. 5. I don't understand what you are saying. Would you please give me an ______(解释)? 6. After a few days of fever, she began to ______ (恢复) from it. 7. People often work out outdoors on the weekend and do something ______(挑战性的). 8. George likes living in Australia, where he had an ______ (令人愉快的) time several years ago. 9. She g_____ from Luhe No. 1 Middle School last July and then went to America for further study. 10. I felt ______ (尴尬的) about what a mess my house was.
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皮皮学刷刷变学霸
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【单选题】设随机变量 X 1 , X 2 ,..., X n ,...独立同分布,且 i=1 , 2 ..., 0 令 Φ( x )为标准正态分布函数,则
A.
0
B.
Φ（ 1 ）
C.
1 －Φ（ 1 ）
D.
1
【单选题】设随机变量X1,X2,......,Xn相互独立,且服从同一个分布,密度函数为f(x),则X1,X2,......,Xn的联合密度函数为
A.
f(x)^n
B.
f(x1)f(x2)…f(xn)
C.
f(x1)+f(x2)+…+f(xn)
D.
nf(x)
【多选题】下列选项中，正确描述对比色的选项是（）？
A.
对比色即色环上相邻的颜色
B.
在12色换上，蓝色与绿色是对比色
C.
在表示强调和对比时可以利用对比色
D.
最常用的对比色是：深色与浅色、亮色与暗色、冷色与暖色
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