（）是协议（合同）开始生效的标志。 A.协议（合同）内容双方达成一致 B.协议（合同

我国最长的湖底隧道—独墅湖隧道全长3460米，一辆汽车从隧道通过，这辆汽车从开始进入隧道到完全驶出隧道共用了200.5秒，而整辆汽车在隧道内的时间为199.5秒．则这辆汽车全长（      ）米，汽车的速度是（     ）米/秒．

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

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 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 “meet” and “out” 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.

36（）

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.

与津液输布和排泄相关的脏腑功能有

A．肺的宣发

B．肺的肃降

C．肾的气化

D．脾的运化

E．脾的“散精”

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结合所学文化生活知识，说明为什么要重视公益性文化事业建设，发展健康向上的文化。

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