题目

化肥为保持粮食丰产起到了重要作用．常用化肥有：①尿素[CO（NH2）2]②硝酸钾KNO3 ③硝酸铵NH4NO3等，请回答：（1）上述化肥中属于复合肥的是      （填序号）．（2）硝酸铵溶解于水后溶液温度明显     （填“升高”或“降低”）  答案：②  降低解析:（1）由两种或两种以上的营养元素组成的化肥叫做复合肥，硝酸钾中含有钾、氮两种元素，故硝酸钾是复合肥，硝酸铵中含有氮元素属于氮肥（2）硝酸铵溶于水吸收热量使溶液的温度降低。  Rewrite the following sentences as required. 1.You have to pay to park here. (改为否定句)You ______ _______ to pay to park here2.Henry Ford invented the world’s first assembly line in 1913. (划线提问)_______ ________ Henry Ford invent the world’s first assembly line?3.They created a Children’s Fund to provide money for those who are ill. (保持句意)They _______ ________ a Children’s Fund to provide money for those who are ill.4.The newspapers will publish the results of the survey. (改为被动语态)The results of the survey will _____ _______ in the newspapers.5.We cannot drink salt water . we cannot take a shower with it, either. (保持句意)We can _____ drink salt water ____ take a shower with it.6.“Have you collected any materials about earthquakes?” asked Ms Ward. (改为宾语从句)Ms Ward asked me _____ I _____ collected any materials about earthquakes.7.a blanket, covered, Tom’s, with, legs, were (连词成句)____________________________________________.