-You look vey angry. What happened to you? -My classmate, Jack, hit me _______ just now. A. on my face B. in my face C. in the face
用惰性电极实现电解，下列说法正确的是 A.电解稀硫酸溶液，实质上是电解水，故溶液pH不变 B.电解稀氢氧化钠溶液，要消耗OH-，故溶液pH减小 C.电解硫
参考下面拟人化的句子，以“玫瑰花和玉兰花”为内容，写两个拟人句。(不超过60字) 梨有五月鲜，苹果有老花甜，阳光斑斑点点筛落枝叶间，映照着累
我们平时说的“白眼球”和“黑眼球”实际上是指 A、虹膜和角膜 B、角膜和巩膜 C、角膜和脉络膜 D、巩膜和虹膜
如图1所示，电源电压不变，滑动变阻器的滑片P从a端滑到b端的过程中： A．电流表、电压表的示数都减小 B．电流表、电压表的示数都增
人的认识能力从无到有的发生，其现实基础是 A.物质 B.客体 C.主体 D.劳动
My class and I visited Chris Care Center in Phoenix, Arizona to comfort the old people who needed a little cheering up during the holiday season. The first two __21__ there were for persons requiri
的值域是
