政府要落实为人民服务的宗旨,必须扩大公民政治参与的权利。
下列各组词语中没有错别字的一组是 ( ) A.通牒 辩论 满堂采 相辅相成 B.脏款 宣泄 渡假
在一定条件下,RO3n—和氟气发生如下反应:RO3n—+F2+2OH— RO4—+2F—+H2O,从而可知在RO3n—中,元素R的化合价是 A.+4
Because the children keep interrupting her whenever she reads a book, she is always _____ her place. A. loosing B. missing C. losing D. looking for
室温下,下列溶液中粒子浓度大小关系正确的是 A.Na2S溶液:c(Na+)>c(HS-)>c(OH-)>c(H2S) B.Na2C2O4溶液中:c(OH-)=c(H+)+c(HC2O4-)+2c(H2C2O4) C.Na2CO3溶液:c(Na+)
There are many thoughts on the origins of civilization. One of the major factors involved was the increase in population. The development of techniques, primarily irrigation and flood control, which p
如图所示,绝缘水平面上静止着两个质量均为m、电量均为+Q的物体A和B(A、B均可视为质点),它们间的距离为r,与水平面间的动摩擦因数均为μ,求
如图,已知⊙P的半径为2,圆心P在抛物线y=x2﹣1上运动,当⊙P与x轴相切时,圆心P的坐标为_____.