题目

草木灰是一种农家肥，其主要成分是K2CO3，它属于 A．钾肥B．磷肥C．氮肥D．复合肥 答案：试题分析：含有氮元素的肥料称为氮肥，含有磷元素的肥料称为磷肥，含有钾元素的肥料称为钾肥，同时含有氮、磷、钾三种元素中的两种或两种以上的肥料称为复合肥。草木灰的主要成分是K2CO3中含有钾元素，属于钾肥，答案选A Life in Britain  Homes and families:    Many British people live in houses, not flats. Most houses have gardens. Daily life:    Most office workers start work at about nine in the morning, and finish at about five or six in the afternoon. Most people don’t go home for lunch. They just have a quick meal. School life :   Children start school at about 9 a.m. and finish at about 3:30 p.m. Most children have lunch at school. All children go to school when they are six or seven. Shops   Most shops open at about 9 a.m. and close at 6 p.m. Usually they don’t close for lunch. 1 The buildings that British people live in are ______      A. gardens        B. houses       C. rooms        D. flats 2 Most children have lunch _______ A. at school.  B. at home.     C. in the shop. D. in the garden. 3 How old do the children start to go to school in Britain? ______ A. Four.  B. Four or five.  C. Twelve or thirteen.   D. Six or seven. 4 Can you buy things in the shops at lunch time ? A. Yes. They don’t close for lunch.         B. No. Shops open at 1 p.m.  C. Yes. But there is no people in the shop.    D. No. They close for lunch. 5 What do the most office workers do at about nine in the morning? A. Have breakfast.   B. Go to school.   C. Drink coffee.     D. Start work.