题目

按要求完成下列句子，每空一词。 1．These are my brothers. (一般疑问句) _______ ________  your brothers? 2. Is that a pencil? (否定回答) ______, ______ ________. 3. The book is red. (划线提问) _____ ______ _______ the book? 84. That is his parent. (改为复数) ______ ______ his ________. 5. She is my sister. (改为否定句) ______ ______ _______ my sister. 答案：1. Are these   2. No, it isn’t. 3. What color is 4. Those are  parents 5. She is not5．小明经常利用所学知识帮父母解决实际问题们．（1）今春垦区普遍低温，小红建议适当增加下列化肥中C（填字母序号）的施用量，以增强作物的抗寒能力．A．NH4NO3         B．K2SO4          C．Ca（H2PO4）2（2）他用pH试纸测得自家土壤浸出液的pH为5，应施用熟石灰来改良土壤．（3）化肥硝酸铵的标签如图所示，推测硝酸铵具有的性质是A（填字母）．A．易溶于水           B．有挥发性        C．受热易分解（4）施用该类肥料时，要避免与碱性（填“酸性”或“碱性”）物质混合使用，以防降低肥效．