试题与答案

若a,b,c分别为△ABC的三边之长,则|a-b-c|+|b-c-a|-|c-a-b

题型:单项选择题

题目:

若a,b,c分别为△ABC的三边之长,则|a-b-c|+|b-c-a|-|c-a-b|=()。

A.a+b+c

B.b+c-a

C.3a-b-c

D.3c-a-b

答案:

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题型:阅读理解

阅读理解。

       The English language we know today is about six hundred years old. For half that time, English was

  just language of the people living in England. The modem English language grew from about the year

  1400. Now English is the most widely spoken language in the world. It is one of the working languages at

   International meetings, business, science and in other fields.

       The differences between American English and British English are not very great. Written English is

  more or less the same in both Britain and America, though there are some spelling differences. For

  example, centre, licence, colour and travelled are spelt center, license, color and traveled in American

  English. In America, "cock, rubber, ill, holiday, lorry and post" are called "rooster, eraser, sick, vacation,

  truck, mail". But people from the two countries can still understand each other easily.

       There are only a very small number of differences in grammar between American English and British

  English. Some words may have two kinds of pronunciation. You may wonder "Which is correct?" The

  answer is that it doesn't matter. But you should speak either American English or British English. Don't try

   to speak both at the same time!

1. When did the modem English language begin to grow?

    ______________________________________________________________

2. Is English the only working language at International meetings?

    ______________________________________________________________

3. What is the word "color" spelt in British English?

    ______________________________________________________________

4. What is the word "ill" called in American English?

    ______________________________________________________________

5. How many differences are there in grammar between American English and British English?

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