题目

从12的约数中任选四个数组成比例是． 答案：【答案】1：2=3：6．（答案不唯一）【解析】试题分析：写出12的约数，然后运用比例的意义或比例的基本性质写出比例即可．解：12的约数有1、2、3、4、6、12．运用比例的意义或比例的基本性质可以写出以下比例：①1：2=3：6；②2：4=3：6；③2：4=6：12；④2：3=4：6；…故答案为：1：2=3：6．（答案不唯完形填空（共15小题，每小题1分，满分15分）阅读下面短文，掌握其大意，然后从每题所给的A、B、C、D四个选项中选出最佳选项。The Clean Your Plate Campaign (运动) began on the Internet in January. It suggests people to reduce (降低) food waste. Qi Haoran, a from Harbin, was quite busy-- and not just homework over the past winter vacation. Qi made a volunteer group with other classmates to advise people to the Clean Your Plate Campaign.The 11 students went to many and told people the importance of saving food. “ , do you know that 950 million people around the world still got enough to eat? Please don’t waste food.” They would say this hundreds of times every day.China has experienced serious problems with wasted food for years. CCTV has reported that the food Chinese people waste every year is enough to 200 million people for a year.Chinese people are well known for being friendly and warm-hearted to others. Many even think that they lose face their guests have eaten all the food.Luckily, the campaign has got the support of . In a restaurant in Xinjiang, the owner gives the who have eaten all that they ordered a special ticket. People can enjoy a(n) meal when they have 10 tickets. Many people think it’s great to enjoy a meal without paying. More than 750 restaurants in Beijing have begun to offer dishes and encourage their guests to take left food home.Did you finish your today? To reduce food waste is a big task, and it needs time. It’s important that everyone does their best, just like Qi.1.A. student B. waiter C. cook D. teacher2.A. in B. of C. for D. with3.A. nine B. ten C. eleven D. twelve4.A. join B. stop C. save D. leave5.A. libraries B. museums C. hospitals D. restaurants6.A. I’m sorry B. Good morning C. Excuse me D. By the way7.A. have B. haven’t C. has D. hasn’t8.A. quietly B. recently C. quickly D. nearly9.A. feed B. keep C. grow D. plant10.A. unless B. until C. if D. that11.A. many B. some C. few D. none12.A. waiters B. cooks C. guests D. students13.A. free B. cheap C. expensive D. special14.A. bigger B. nicer C. worse D. smaller15.A. homework B. report C. meal D. waste