常见的摘要算法有消息摘要4算法MD4、消息摘要5算法MD5和 ______。 发布时间：2017-04-04 04:33 │ 来源：www.tikuol.com 题型：填空题 问题： 常见的摘要算法有消息摘要4算法MD4、消息摘要5算法MD5和 ______。
题型：填空题 完形填空。 In most parts of the world, many students help their schools make less pollution. They join " 1 ". In a meaningful club, people work together 2 our environment clean. Here are some things students often do. No-garbage (废料,垃圾) lunches. How much do you throw away 3 lunch? Environment clubs ask students to bring heir lunches in bags that can 4 again. Every week, they will choose the classes that makes the least garbage and report them to the whole school. No-car day. On a no-car day, 5 comes to school in a car. Neither the students nor the teachers! Cars give pollution to the air. 6 remember: walk, jump, bike or run. Use your legs! It's lots of fun. 7 the water! Did you know that some toilets could 8 twenty to forty cubic (立方的) meters of water an hour? In a year, to your 9 , that would fill a small river! In environment clubs, students repair those broken toilets 10 . We love our environment. Let's work together and make it clean. ( )1. A. no-car day ( )2. A. make ( )3. A. since ( )4. A. use ( )5. A. somebody ( )6. A. So ( )7. A. Turn on ( )8. A. waste ( )9. A. surprise ( )10. A. their B. environment club B. making B. until B. be used B. anybody B. And B. Turn up B. give B. surprised B. they C. new music groups C. to make C. before C. throw C. everybody C. But C. Turn off C. keep C. surprising C. them D. no-garbage lunchesD. will make D. after D. be thrown D. nobody D. Or D. Turn down D. throw D. surprisingly D. themselves 查看答案
题型：填空题 弹性系数是指两个有因果关系的经济变量，当一个经济变量发生1%的变动时，由它引起的另一个经济变量变动的百分比，通常表示因变量对自变量的反映的敏感程度。下列系数被称为富有弹性的系数是（）A.1.728B.1.178C.1D.0.965E.2.543 查看答案
