党的民主集中制的基本原则是（）
A、党员个人服从党的组织ABCD
暂无解析
Anyvisitorstotheproductionfacilitiesmust____asecuritypassfromtheinformationdeskatthefrontentrance.
Themanagergaveherhis_____thatthecomplaintwouldbeinvestigated.
Tobeginsomeactivityisto_____doingit.
设二次型f(x1,x2)=x12+4x1x2+4x22经正交变换化为二次型，求ab的值。
RegisteryournameandaddressontheWebsiteinorderto____apurchaseonline.
