下列各组物质在溶液中不能发生复分解反应的是（ ）
A．碳酸钙和盐酸
B．硝酸银和盐酸
C．硝酸钾和氯化钠
D．氯化钡和稀硫酸
A、碳酸钙和盐酸能反应生成氯化钙、二氧化碳和水，故反应能够进行，故A正确；
B、硝酸银和盐酸反应能生成氯化银沉淀，故B正确；
C、硝酸钾和氯化钠交换成分无气体、沉淀或水生成，故C错误；
D、氯化钡和硫酸能反应生成硫酸钡沉淀，故D正确．
故选C．
 If you wish to become a better reader, here are four important points to remember about speed* of reading. 1.Knowing why you are reading will often help you to know whether to read rapidly* or slowly. 2. Some things should be read slowly throughout. Science and history books are full of important information. You must read such things slowly to remember each important step and understand each important idea. 3.Some things should be read rapidly throughout. Examples are simple stories meant for enjoyable, letters from friends, news from local or hometown paper, telling what is happening to friends and neighbors. 4. In some of your readings, you must change your speed from fast to slow and slow to fast, as you go along. You will need to read certain pages rapidly and then slow down and do more careful reading when you come to important ideas. 小题1:This passage mainly tells us some important points about how to .
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