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【单选题】
如果回归模型中存在多重共线性,则( )A.
整个回归模型的线性关系不显著
B.
肯定有一个回归系数通不过显著性检验
C.
肯定导致某个回归系数的符号与预期的相反
D.
可能导致某些回归系数的通不过显著性检验
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举一反三
【多选题】Under what circumstances would people like to listen with more effort?
A.
People would like to listen to polite requests.
B.
People would like to listen to attention grabbers.
C.
People would like to listen for shared agreements.
D.
People would like to listen for protecting rightness.
【简答题】People listen to it to enjoy themselves．
【单选题】Old people like to ______ the radio and my parents like to ______ TV. [ ]
A.
listen; see
B.
listen; watch
C.
watch; listen to
D.
listen to; watch
【简答题】People listen to news through it.
【多选题】关于砌体结构特点的说法，正确的有______。
A.
砌体材料抗压性能好
B.
结构保温性能好
C.
可用于跨度小于20m的中小型厂房的墙体、柱和基础。
D.
结构耐火性能差
E.
砌体的受力特点是抗压强度较高而抗拉强度很低
【多选题】关于砌体结构特点的说法，正确的有（）。
A.
砌体材料抗压性能好
B.
结构保温性能好
C.
可用作跨度小于20m的中小型厂房的墙体、柱和基础
D.
结构耐火性能差
E.
砌体的受力特点是抗压强度较高而抗拉强度很低
【单选题】One of the few things you ___ say about English people with certainty is that they talk a lot about the weather.
A.
need
B.
must
C.
should
D.
can
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