南朝高凉郡俚族首领冼夫人坚持维护与祖国的统一,她支持陈霸先平定岭南的叛乱,使得陈霸先得以建立陈朝,固而被封为石龙郡太夫人。
Night________(fall),wehurriedhome.
Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.
设二次型f(x1,x2)=x12+4x1x2+4x22经正交变换化为二次型,求ab的值。
Thefarmerhadtowearheavybootsinthewinterbecausethefieldsweretoowetand________.
Idon'tknowhowwecanmake________onthetimetableforanymorecourses.