牛津上海版八年級(jí)上冊(cè)《Module 2 Amazing things Unit 4 Numbers》2020年同步練習(xí)卷
發(fā)布：2024/11/19 20:30:2
一、選擇題。
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1．A computer can do a calculation you could not do in your whole lifetime．（ ?。?/h2>
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2．Peter is a sportsman from Britain a skillful body．（ ?。?/h2>
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3．Subtract 8 from 23，how much will you get？ ．（ ?。?/h2>
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4．Will you please use your own computer to solve the problem？（ ）
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5．The desk and the bed take up of the space of the room．（ ）
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6．Nick didn't do very in the final exam，but his scores are than last year's．（ ?。?/h2>
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7．How can we read "230，764"in English？ ．（ ?。?/h2>
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8．Tom a lot of on his study．（ ?。?/h2>
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9． all the figures from 0 to 9，we can write numbers from the biggest to the smallest．
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10．Computers are accurate and fast they are used by people from all over the world．（ ）
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11．We call the number 67.89 a（n） ．（ ?。?/h2>
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C. Read the passage and fill in the blanks with proper words. The first letters are given（在短文空格內(nèi)填入適當(dāng)?shù)脑~，使其內(nèi)容通順，每空限填一詞，首字母已給）
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32．Mind Those Manners on the Subway So，there you are，just sitting there in the subway car，enjoying that book you just bought．Suddenly，you feel someone leaning over your shoulder reading along with you．Or，the person sitting next to you takes out a nail clipper （指甲刀） and begins cutting his or her nails．
Annoying？Many of us have to spend some time every day on public transportation．We all know that some behaviors are s（1）unacceptable．So，to make the trip more pleasant，we suggest the following：
Let passengers get off the bus or subway car before you can get on．Getting off and on in an orderly m（2）can save time for all．
S（3）away from the doors when they are closing．
Don't talk loudly on a bus or subway．Chatting loudly with your friends can be annoying （討厭的） to o（4）．
Don't think your bags and suitcases（手提箱） deserve a seat of their o（5）．
Use a tissue whenever you cough or sneeze （打噴嚏）．An uncovered sneeze can s（6）germs，especially in crowded places．
Don't cut your nails or pick your nose on public transportation．
Don't read over other people's shoulder．Many people do this on subways，but it's r（7）annoying．It can make people uncomfortable．They might think you're too stingy （小氣的） even to buy a newspaper．Or they might think you're judging their behavior．組卷：6引用：1難度：0.6
D. Answer the questions（根據(jù)短文內(nèi)容回答問(wèn)題）
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33．Let me try a wild guess：the system of passwords you use on the Internet- for accessing online banking，e-mail，shopping sites，and Renren accounts- is a mess（一團(tuán)糟）．
You know perfectly well what you ought to be doing for each site you visit，you should be choosing a different，complex sequence of letters，numbers and symbols，and then memorizing it． （That's the first rule of the common knowledge on passwords：never，ever write them down．） But you don't do this，because it's hard for you to remember so many numbers．
So instead，you use the same familiar words for every site-your dog's name，the name of your street-by adding"123"at the end．Or maybe you do try to follow the rules，and if you're probably getting locked out of your bank account，you began trying to remember the answers to various security questions． （"What was your favourite sport as a child？"）
A recent security breach （安全漏洞） at Yahoo showed that thousands of users' passwords were either "password"， "welcome"， " 123456"or"ninja"．People choose terrible passwords even when more is in danger than their savings．
Password hacking takes many different forms．This is where the length of your password makes an almost unbelievable difference．For a hacker with the computing power to make 1，000 guesses per second，a five-letter，purely random，all-lower-case password，such as "fpqzy"，would take three and three quarters hours to crack．Increase the number of letters to 20，and the cracking time increases it's 6.5 thousand trillion centuries．
If you think you've got a clever system for coming up with passwords，the chances are that hackers are already familiar with it．The least hackable password，then，would be a long string of completely random letters，numbers，spaces and symbols but you'd never remember it．
However，because length matters very much，the surprising truth is that a longish string of random English words，all in lower case-say， "awoken wheels angling ostrich"-is actually much more secure than a shorter password that follows your bank's annoying rules，such as "M nch3st3 r"．
（1）According to the writer，what's the reason for most people to write down their password？
（2）What else do people have to remember if they get locked out of their bank account？
（3）According to the Yahoo security breach， "ninja" is among those terrible passwords，isn't it？
（4）How long does it usually take a hacker to crack a password，such as "fpqzy"？
（5）Which password is probably a secure one， " m@nch3st3 r"or " welcome123"？
（6）What does a safer secure password possibly consist of？組卷：4引用：2難度：0.6