(2010)设齐次线性方程组,当方程组有非零解时,k值为:() ["-2或3","2或3","2或-3","-2或-3"]
非正式沟通的优点是() ["A.易于保密","B.不够灵活","C.内容广泛","D.改善人际关系","E.真实性欠佳"]
在Photoshop中,CS的色彩调整工具中,最常用的是()。 ["色阶","曲线","去色","色彩平衡"]
正式沟通的缺点是() ["易于保密","不够灵活","内容广泛","改善人际关系","真实性欠佳"]
每张处方开具的药品不得超过几种() ["1","2","3","4","5"]
专属经济区和大陆架有相同之处吗?