题目

在日常生活中，下列说法正确的是 ( )A. 人体缺乏维生素A会引起夜盲症B. 包装食品的聚氯乙烯塑料袋可用加热的方法封口C. 冬天室内用煤炉取暖，为防止煤气中毒，在煤炉上放一盆水D. 图书档案着火，最好用干粉灭火器灭 答案：【答案】A【解析】A、维生素A在人体中缺乏时会患夜盲症，正确；B、聚氯乙烯塑料中的增塑剂有毒，所以食品袋不能用聚氯乙烯塑料袋，错误；C、一氧化碳难溶于水，在炉子上放一盆水无法避免煤气中毒，错误；D、图书档案属于贵重物品，图书档案着火，最好用液态二氧化碳灭火器灭火，因为干粉灭Teachers，grandparents，parents and classmates，I'm very proud that I have been chosen to speak to you all today.I'm a bit nervous as I've never made a speech before so many people，so please forgive me if it shows.As we all know，it's time to say goodbye to everyone.We're sorry to leave you at the end of our junior high school education，and we promise that we'll never forget the happy times we have spent in these buildings with you all.Now，I'd like to thank three groups of people for the three things I've learnt while I've been a pupil at our school.The first group is my friends，and what I've learnt is the importance of friendship.We've worked hard together，we've even shared some difficult times together，but we've also had a lot of fun.Many of us will go to new schools and we may not see each other so often in the future.But friends don't have to see each other all the time.Sometimes the friends you treasure(珍惜) most are the friends you see less often.A life without old friends is like a day without sunshine.We'll always stay in touch.The second group is our parents and grandparents.We thank you for the love you have shown us during our years at junior high school，for making a home where we feel both safe and relaxed.We also thank you for your help with our homework.How many of us owe our good grades to the suggestions you have made during those long evenings？And finally，the third group is our teachers.We can never pay you back for your kindness，your patience，and knowledge which you have offered us.Sometimes you've made us work very hard.But you have always been fair and you'll always be our role models.There's a saying from Ireland which is a favorite of mine：Strangers are only friends you haven't met yet.I couldn't say it better myself.So from the bottom of my heart，I thank you all and wish you success for the future.1.The speech was probably made by ________.A. a head teacher B. a graduateC. a new student D. a school clerk2.What's the main purpose of the speech?A. To say goodbye to three groups of people.B. To make a promise for the bright future.C. To show appreciation to the people around.D. To remember the happy times in the school.3.From the passage，we know that the three things the writer have learnt at school are ________.A. friendship，love and knowledgeB. help，patience and friendshipC. kindness，patience and happinessD. love，help and kindness4.According to the passage，the writer feels ________ when making the speech.A. proud and strict B. nervous and worriedC. fun and excited D. warm and thankful5.According to the passage，which of the following is NOT true?A. The writer will meet his friends less in the future.B. The writer's families always get everything ready for him.C. The writer's teachers sometimes are strict with students.D. The writer had many happy times in his school.