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【单选题】
A prediction equation for starting salaries (in $1,000s) and SAT scores was performed using simple linear regression. In the regression printout shown below, what can be said about the level of significance for the overall model?A.
SAT is not a good predictor for starting salary.
B.
The significance level for the intercept indicates the model is not valid.
C.
The significance level for SAT indicates the slope is equal to zero.
D.
The significance level for SAT indicates the slope is not equal to zero.
E.
None of the above
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举一反三
【单选题】以下关于信息光学中空间频谱的说法正确的是
A.
时间频率，电流电压等周期性信号的周期的倒数
B.
属于光谱，由光波的波长决定
C.
有利于在三维空间描述光波的行为
D.
光波场空间周期的倒数，空间频率，代表不同方向的平面波
【多选题】下列关于脑电功率谱分析的描述正确的是
A.
脑电功率谱表达的是脑电信号频率与脑电频率之间的关系
B.
脑电功率谱边缘频谱指标只能用于脑占位性病变的诊断
C.
脑电图是许多不同频率、相位正弦波叠加出来的综合波形
D.
脑电功率谱表达的是脑电信号振幅与脑电频率之间的关系
E.
脑电功率谱的边缘频谱指标与麻醉深度有关
【单选题】_______we are concerned , this China Culture Tour is very exercising and a huge success.
A.
As soon as
B.
As far as
C.
As though
D.
Now that
【单选题】-I have got into the __________ of turning on the TV as soon as I get home. -I think it's not good and you should do your homework first. [ ]
A.
hobby
B.
habit
C.
interest
D.
walk
【简答题】n. 商店,贮藏; vt. 储存,贮藏
【单选题】This is a huge and difficult project and if you take it up, you ________ many difficulties.
A.
like to encounter
B.
like encountering
C.
are likely to encounter
D.
are like to encounter
【单选题】This is a huge and difficult project and if you take it up, you ________ many difficulties.
A.
like to encounter
B.
like to encountering
C.
are likely to encounter
D.
are like to encounter
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