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【单选题】
在回归方程 = 698.9-2.28×STR 中,如果斜率系数的t-统计量为-4.38, 则它的标准误是( )?A.
0.52
B.
1.96
C.
-1.96
D.
4.38
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举一反三
【单选题】It can be inferred from the passage that the author would disapprove of______.
A.
computer science courses in high schools
B.
businessmen and women who use pocket calculators
C.
maintenance(连续不断) checks on computers
D.
companies which depend entirely on computers
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【简答题】网络零售的范围包括( ) A 、C2C B、B2B C、B2C D、C2B
【简答题】It can be inferred from the passage that the author would disapprove of ________. A) investment in computers B) the use of one’s internal computer C) double-check on computers D) complete dependence o...
【单选题】The author seems to disapprove of______.
A.
the shutting of schools in Kalkaska
B.
the involvement of the mass media
C.
the Michigan lawmakers' endless debating
D.
delaying the passage of the school funding legislation
【单选题】Which of the following groups disapprove of the university combination?
A.
The board members of the involved universities.
B.
High school students seeking for better education.
C.
The professors teaching at the universities.
D.
The federal and state governments.
【单选题】It can be inferred from the passage that the author would disapprove of______.
A.
investment in computers
B.
the use of one's internal computer
C.
double-check on computers
D.
complete dependence on computers for decision -making
【单选题】计算：（a﹣2b） 2 的正确结果是 [ ]
A.
a 2 ﹣4b 2
B.
a 2 ﹣2ab﹣4b 2
C.
a 2 ﹣4ab﹣4b 2
D.
a 2 ﹣4ab+4b 2
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