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【单选题】
已知χ2值为19,df=9,则该χ2值以上及以下的概论是A.
0.025，0.975
B.
0.01，0.99
C.
0.05，0.95
D.
0.25，0.75
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反馈参考答案：
举一反三
【简答题】已知a≠0，S 1 =2a， S 2 = 2 S 1 ， S 3 = 2 S 2 ，…， S 2013 = 2 S 2012 ，则S 2013 =______．（用含a的代数式表示）
【简答题】已知a≠0，S 1 =2a，S 2 = 2 S 1 ，S 3 = 2 S 2 ，…，S 2010 = 2 S 2009 ，则S 2010 =______（用含a的代数式表示）．
【判断题】在进行趋势拟合时，我们希望误差项是一个白噪声序列，也就是不含什么信息的序列，从统计学的角度看，就是这个序列的均值为零，或者接近于零，它的方差为一个常数。
A.
正确
B.
错误
【单选题】听力原文：M: How did you like the new exhibit at the art gallery? W: I still haven't been able to take any time out from studying. Q: What does the woman mean? (16)
A.
She doesn't want to describe the exhibit.
B.
She prefers the artists she has studied.
C.
She hasn't gone to see the exhibit yet.
D.
She hopes they will take some of the paintings away.
【简答题】29下列那种蛋白质在PH=5的溶液中带负电: ( )A. PI=4.5 B．PI=7.4 C．PI=7 D．PI=6.5
【单选题】如图，凸四边形ABCD的两对角线AC、BD将其分成四个部分，每个部分的面积分别为S 1 、S 2 、S 3 、S 4 ．已知S 1 ＞1，S 2 ＞1，则S 3 +S 4 的值（ ）
A.
等于
B.
大于2
C.
小于2
D.
不确定
【单选题】听力原文：W: How about going to the art gallery today? They are having a special exhibit of local artists including your favorite painter. M: I'd love to, if I can get this term paper out of my way. Q: Wha...
A.
He enjoyed the paintings, too.
B.
He has to finish his term paper first.
C.
He can't finish his term paper that day.
D.
He has learned something about the artists.
【单选题】听力原文：M: How did you like the new exhibit at the art gallery? W: I still haven't been able to take any time out from work. Q: What does the woman mean? (17)
A.
She likes the artists she has studied better.
B.
She doesn't hope they will take some of the paintings away.
C.
She hasn't gone to see the exhibit yet.
D.
She doesn't want to describe the exhibit.
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