Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.
Iknowitisn’timportantbutIcan’thelp________aboutit.
设向量组线性无关，则下列向量组线性相关的是（）
ComradeLi________beinBeijingbecauseIsawhimintownonlyafewminutesago.
设曲线y=ax^2+2x在点(1,a+2)处的切线与直线y=4x平行，则a=（）
