【单选题】【消耗次数：1】
Everybody likes her because she is always _______ .
①
Everybody likes her because she is always _______ .
②
cheerful
③
sad
④
selfish
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相关题目
【单选题】
She always put her medication on the top of the
shelf lest the children ____ it by mistake.
①
took
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should take
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had taken
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would take
【单选题】
Kingsley took a lot of ______________ with her while traveling because she was doing scientific research on fish.
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furniture
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equipment
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information
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education
【单选题】
Jean did not have time to go to the concert last night because she was busy __________ for her examination.
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to prepare
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to be prepared
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preparing
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being prepared
【单选题】
It is _____ with the customer not to let the shop assistants guess what she really likes and wants until the last moment.
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in her honor
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on her honor
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a point of honor
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an honor
【单选题】
It is ____ with the customer not to let the shop
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in her honor
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on her honor
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She got married although her parents had not given her their ___.
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allowance
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随机题目
【多选题】
下列说法正确的是（）
①
0≤r1表示两个变量间存在正线性相关关系
②
|r|越接近于0，表示两个变量间的线性相关程度越低
③
进行相关回归分析，应注意对相关系数和回归直线方程的有效性进行检验,
④
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|r|=1表示两个变量间存在完全线性相关关系;
【多选题】
下列说法正确的是（）
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当相关系数r为正时，一元线性回归模型中的回归系数一定为正
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在回归分析中,自变量和因变量都是随机变量
③
进行相关回归分析，应注意对相关系数和回归直线方程的有效性进行检验,
④
回归分析和相关分析一样，所分析的两个变量都一定是随机变量。
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回归系数的绝对值小于1
【多选题】
显著性水平α与检验拒绝域的关系是（）
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显著性水平提高意味着拒绝域不变
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显著性水平提高意味着拒绝域缩小
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显著性水平降低意味着拒绝域扩大
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显著性水平降低意味着接受域扩大
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显著性水平提高意味着拒绝域扩大
【多选题】
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工期延误索赔
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对超额利润的索赔
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质量不满足合同要求的索赔
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承包商不履行的保险费用索赔
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法律、货币及汇率变化引起的索赔