日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

精英家教網 > 高中英語 > 題目詳情

【題目】第二節
根據短文內容,從短文后的選項中選出能填入空白處的最佳選項,選項中有兩項為多余選項。
Secret codes (密碼)keep messages private。Banks, companies, and government agencies use secret codes in doing business, especially when information is sent by computer.
People have used secret codes for thousands of years. Code breaking never lags(落后) far behind code making. The science of creating and reading coded messages is called cryptography.
There are three main types of cryptography. For example, the first letters of “My elephant eats too many eels” Spell out the hidden message “Meet me.”
You might represent each letter with a number, For example, Let’s number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter, the message “Meet me” would read “13 5 20 13 5.”
A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book. For example “bridge“ might stand for “meet” and “out” might stand for “me.” The message “bridge out” would actually mean “Meet me.” However, it is also hard to keep a code book secret for long. So codes must be changed frequently.
A. It is very hard to break a code without the code book.
B. In any language, some letters are used more than others.
C. Only people who know the keyword can read the message.
D. As long as there have been codes, people have tried to break them.
E. You can hide a message by having the first letters of each word spell it out.
F. With a code book, you might write down words that would stand for other words.
G. Another way to hide a message is to use symbols to stand for specific letters of the alphabet.

【答案】D;E;G;F;A
【解析】(1)D 根據后句內容可以判斷此處提到了有密碼的設置就有破譯密碼的存在,D項可以承接上下文。
(2)E 根據后面舉的例子判斷該空應該介紹藏起一個單詞前面的字母的密碼設置方法.
(3)G 根據后面的解釋內容可以判斷這是介紹密碼設置的又一種方法,判斷G選項符合語境,對應詞represent和stand for。
(4)F 根據后面的舉例以及前句中的 a code book可以判斷該句是介紹密碼書的使用。
(5)A 前后句都是介紹密碼書,后句講密碼書不會維持很久的時間,判斷A選項符合語境。

練習冊系列答案
相關習題

科目:高中英語 來源: 題型:

【題目】請聽第8段材料,回答小題。

1What does the woman want?

A. An overcoat. B. A jacket. C. A skirt.

2Who promised to solve the problem for the woman?

A. The tailor. B. The manager. C. The tailor’s assistant.

3When will the speakers go to the tailor’s?

A. Next Saturday morning. B. Next Saturday afternoon.

C. Next Sunday morning.

查看答案和解析>>

科目:高中英語 來源: 題型:

【題目】Then other pirate radio stations began to spring up and soon the authorities were being forced to face the new situation created by the pirate stations.

A. government B. power

C. experts D. radio stations

查看答案和解析>>

科目:高中英語 來源: 題型:

【題目】China to promote(推進)traditional opera in schools

China’s central government has pledged(保證,發誓)to promote traditional opera in schools.

Primary schools, secondary schools, colleges 1universities will give students the opportunity 2 (watch) traditional opera free of charge in 2017, according to a guideline jointly 3(make) by the publicity department of the Communist Party of China and the ministries of culture, education and finance. By 2018, students in all schools and colleges nationwide can watch4single opera free of charge every year.

The campaign for traditional opera to reach students will be common in all schools by 2020, 5will make traditional opera popular6students, teachers and families. The guideline also urges schools to strengthen the creation of opera interest groups. It once 7(call) on the joint(共同的)efforts of the government, education, society and individuals of support the campaign. The guideline also encourages investment(投資)from enterprises, social 8(organize) and individuals. There are hundreds of forms of local opera in China, with Peking Opera the most famous. Peking Opera and Kunqu Opera 9(list)by UNESCO as an intangible(無形的)10(culture)heritage(遺產).

查看答案和解析>>

科目:高中英語 來源: 題型:

【題目】學校圖書館需要購置一批新書,現向學生征求意見。假如你是李華,你認為學校圖書館最需要購置科普類圖書(popular science books)和文學類圖書(literary books)。請你用英語給圖書館王老師寫一封100詞左右的信,推薦這兩類書,并分別說明推薦理由。

Dear Mr. Wang,

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

_______________________________________________________________

Yours sincerely,

Li Hua

查看答案和解析>>

科目:高中英語 來源: 題型:

【題目】In order to stop the virus from spreading further, the scientist all possible ways to control it in the past few months. (explore)
在過去的幾個月里,這位科學家一直在探索所有可能的方法來控制這種病毒進一步擴散。

查看答案和解析>>

科目:高中英語 來源: 題型:

【題目】假定英語課上老師要求同桌之間交換修改作文,請你修改你同桌寫的以下短文。短文中共有10處錯誤,每句中最多有兩處。錯誤涉及一個單詞的增加、刪除或修改。

增加:在缺詞處加一個漏字符號(∧),并在此符號下面寫出該加的詞。

刪除:把多余的詞用斜線(\)劃掉。

修改:在錯的詞下劃一橫線,并在該詞下面寫出修改后的詞。

注意:1. 每處錯誤及其修改均僅限一詞;

2. 只允許修改10處,多者(從第11處起)不計分。

There are not enough seats in our school’s reading room. One morning just before our finally examination, I got there very early to occupying a seat. I put a book on the desk and then went to have a breakfast. While I came back, I found someone was sitting on the seat which I had occupied in the advance. I run to him immediately and shouted at him, “Going away! It’s my seat!” Everyone in the reading room raised their eyes and stared at me on an unfriendly way. I felt very ashamed, but I rushed out of the reading room with my book. I learned a hard lesson that day- I should respect and polite to other people.

查看答案和解析>>

科目:高中英語 來源: 題型:

【題目】閱讀下面材料,在空白處填入適當的內容(1個單詞)或括號內單詞的正確形式。
A good teacher is many things to many people. In my own experience, the people I respect most are the teachersdemanded the most discipline from their students.
I miss one teacher in particular that I had in high school. I think she was a good teacher because she was a very strict person. I remember very (clear) a sign over her classroom door. It was simple sign that said, “Laboratory—in this room the first five letters of the word was emphasized, not the last seven. ” In other words, I guess, labor for her was more (importance), which means (make) speeches.
She prepared her work very carefully and demanded us to do the same. We got lots of homework from her. Once she had broken (she) arm, and everybody in the class thought that maybe the homework (reduce), but it continued just the same. She checked our work by stamping her name at the bottom of the papers to show that she had read
I think sometimes teachers who demand most are(like)least. But time goes by, this discipline really seems to benefit the students.

查看答案和解析>>

科目:高中英語 來源: 題型:

【題目】請你以The power of humor為話題寫一篇短文,談談幽默在生活中的重要作用。
詞數100左右;文體不限,題目自擬。

查看答案和解析>>

同步練習冊答案
主站蜘蛛池模板: 日韩一区二区在线电影 | 国产成人久久精品麻豆二区 | 国产美女一区二区 | 亚洲午夜精品在线观看 | 成人在线视频免费观看 | 毛片网站在线观看 | 91黄色在线观看 | 国产精品久久久久久久久久东京 | 国产成人午夜 | 青草av在线 | 欧美日韩二区三区 | 欧美一区精品 | 天天久久 | 久久久一区二区 | 天堂成人国产精品一区 | av国产精品 | 久久成人国产精品 | 久久99精品久久久久久久 | 第一色综合 | 狠狠插狠狠操 | 天堂精品一区二区三区 | 午夜激情福利视频 | 日本视频中文字幕 | 一区二区三区不卡视频 | 黄色在线观看网站 | 欧美精品区| 毛片网络| 成人av影院 | 白浆在线播放 | 人人澡人人澡 | 国产在线导航 | 国产精品123| 男男gay腐片h大尺度 | 成年人免费在线视频 | 国产精品无码永久免费888 | 国产成人一区二区三区影院在线 | 久久久久极品 | 午夜视频在线观看免费视频 | 日本一二三区在线 | 可以看黄色的网站 | 亚洲一区二区 |