在移动图书馆-学术资源栏目下,以下有哪个分类没有的?()

A.动图[单选]无黏性土坡破坏时的滑动面通常近似为()A.平面B.圆弧C.双曲面D.对数螺旋曲面


B.书馆Louiewasfun,withagreatsenseofplay,andyet,unafraidto()newchallenges.


C.学术下电器线路火灾的基本原因有:


D.栏目类没Manycountrieshavebeeninrecessionforalongtime;therefore,alotofpeoplelookforwardtoeconomic___________inthecomingyear.