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21grams 2016-06-08 18:31:33 +08:00
不知道在说啥
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edwardaa 2016-06-08 19:33:20 +08:00
全国卷英语在全国什么水平, 6 级难度有吗?
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SuT2i 2016-06-08 20:12:06 +08:00 via Android
你……头像……有毒……啊…
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dphdjy OP |
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ivmm 2016-06-08 21:28:53 +08:00
看得懂你的问题的人需要具备以下条件
1 , 看过侦探小说 2. 考过全国卷 3. 码农 |
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dphdjy OP 哦,题目出来了,看看就明白了
(材料) Secret codes(密码) 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, 36 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. 37 For example, the first letters of "My elephant eats too many eels" spell out the hidden message "Meet me." 38 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 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, 39 For example, "bridge" might stand for "me." The message "bridge out" would actually mean "Meet me." 40 However, it is also hard to keep a code book secret for long. So codes must be changed frequently. @ivmm @SuT2i @edwardaa @21grams |
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kimchong 2016-06-08 21:49:10 +08:00 via Android
楼主全对了吧 XD
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edwardaa 2016-06-08 21:57:04 +08:00
楼主既然能上这论坛,我估摸着你英语再怎么落后也不会不行的。。。
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21grams 2016-06-08 22:49:23 +08:00 via Android
原来高考英语这么简单
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dphdjy OP |