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【单选题】
两个变量y与x的回归模型中，分别选择了4个不同模型，它们的相关指数R 2 如下，其中拟合效果最好的模型是 [     ]
A.
模型1的相关指数R 2 为0.98
B.
模型2的相关指数R 2 为0.80
C.
模型3的相关指数R 2 为0.50
D.
模型4的相关指数R 2 为0.25
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参考答案：
举一反三
【简答题】Q1: What is a welfare supposed to do? Q2:How has the writer chosen to live as a ? Q3: W hat has become of the wel fare caseworkers?
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【单选题】（）是指处于低增长率、高市场占有率象限内的产品群，已进入成熟期。
A.
明星产品
B.
现金牛产品
C.
问题产品
D.
瘦狗产品
查看完整题目与答案
【单选题】听力原文：M: How many students has the teacher chosen for the English speech contest? W: Well, as far as I know, whether there will be such a contest is yet to be decided. Q: What does the woman mean? (13)
A.
He is afraid he won' t be chosen for the English speech con- test.
B.
It's not cartain whether the English speech contest will take place.
C.
The teacher has not decided who to take part in the contest.
D.
No one wants to be chosen.
查看完整题目与答案
【单选题】听力原文：W: Which color would you choose? M: It makes no difference to me. Q: What does the man mean about the color? (5)
A.
The man is concerned about the color choice.
B.
The man doesn't care which color is chosen.
C.
The woman has chosen a nice color.
D.
The man's choice is different from the woman's.
查看完整题目与答案
【简答题】SS-7802型双踪示波器是一种()道示波器,
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【单选题】听力原文：W: The shirt suits you very well! M: Thank you! What I can't figure out is why I've never chosen this color before. Q: What dues the man mean? (19)
A.
He chose the shirt a long time ago.
B.
He has no other clothes the same color.
C.
The collar fits him very well.
D.
He didn't buy the shirt for himself.
查看完整题目与答案
【单选题】人类假二倍体的染色体条数是 。
A.
46
B.
45
C.
47
D.
44
E.
数目不定
查看完整题目与答案
【单选题】（ ）是指处于低增长率、高市场占有率象限内的商品群，已进入成熟期，其商品特点是销量大、利润率高、负债率低。
A.
明星产品
B.
问题产品
C.
现金流产品
D.
瘦狗产品
查看完整题目与答案
【单选题】关于眼的检查,错误的说法是:
A.
动眼神经功能损害时，调节反射消失，但辐辏反射存在
B.
中心视力是检查眼底黄斑中心窝的功能
C.
周边视力是检查黄斑中心窝以外的视网膜功能
D.
近视力检查能了解眼的调节能力
E.
如可疑视神经乳头、黄斑
查看完整题目与答案
【单选题】金牛类产品是指处于低增长率、高市场占有率象限内的产品群，已进人成熟期。可采用()战略。
A.
发展战略
B.
收获战略
C.
选择性投资战略
D.
撤退战略
查看完整题目与答案
相关题目：
【简答题】Q1: What is a welfare supposed to do? Q2:How has the writer chosen to live as a ? Q3: W hat has become of the wel fare caseworkers?
查看完整题目与答案
【单选题】（）是指处于低增长率、高市场占有率象限内的产品群，已进入成熟期。
A.
明星产品
B.
现金牛产品
C.
问题产品
D.
瘦狗产品
查看完整题目与答案
【单选题】听力原文：M: How many students has the teacher chosen for the English speech contest? W: Well, as far as I know, whether there will be such a contest is yet to be decided. Q: What does the woman mean? (13)
A.
He is afraid he won' t be chosen for the English speech con- test.
B.
It's not cartain whether the English speech contest will take place.
C.
The teacher has not decided who to take part in the contest.
D.
No one wants to be chosen.
查看完整题目与答案
【单选题】听力原文：W: Which color would you choose? M: It makes no difference to me. Q: What does the man mean about the color? (5)
A.
The man is concerned about the color choice.
B.
The man doesn't care which color is chosen.
C.
The woman has chosen a nice color.
D.
The man's choice is different from the woman's.
查看完整题目与答案
【简答题】SS-7802型双踪示波器是一种()道示波器,
查看完整题目与答案
【单选题】听力原文：W: The shirt suits you very well! M: Thank you! What I can't figure out is why I've never chosen this color before. Q: What dues the man mean? (19)
A.
He chose the shirt a long time ago.
B.
He has no other clothes the same color.
C.
The collar fits him very well.
D.
He didn't buy the shirt for himself.
查看完整题目与答案
【单选题】人类假二倍体的染色体条数是 。
A.
46
B.
45
C.
47
D.
44
E.
数目不定
查看完整题目与答案
【单选题】（ ）是指处于低增长率、高市场占有率象限内的商品群，已进入成熟期，其商品特点是销量大、利润率高、负债率低。
A.
明星产品
B.
问题产品
C.
现金流产品
D.
瘦狗产品
查看完整题目与答案
【单选题】关于眼的检查,错误的说法是:
A.
动眼神经功能损害时，调节反射消失，但辐辏反射存在
B.
中心视力是检查眼底黄斑中心窝的功能
C.
周边视力是检查黄斑中心窝以外的视网膜功能
D.
近视力检查能了解眼的调节能力
E.
如可疑视神经乳头、黄斑
查看完整题目与答案
【单选题】金牛类产品是指处于低增长率、高市场占有率象限内的产品群，已进人成熟期。可采用()战略。
A.
发展战略
B.
收获战略
C.
选择性投资战略
D.
撤退战略
查看完整题目与答案
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