如图，△ABC中，∠C=90°，AD为角平分线，若CB=8cm，BD=5cm，则

阅读理解。 

     Some people have good memories. T hey can easily learn a long poem by heart.   There are others who

can only remember things when they have said again and again. The famous English writer Charles Dickens

said that he could walk down any street in London and then tell you the name of every shop he had passed. 

 Many of the great men of the world have had wonderful memories.    A good memory is a great help in

learning a language.  Everybody learns his own language by remembering what he hears when he is a small

child.  Some children like boys and girls don't live in their own country, and they seem to learn two languages

almost as easily as one.  In schools it is not so easy to learn a foreign language because students have so little

time for it and they are busy with other lessons, too. A man's mind is rather like a camera,  but it takes photos

not only of what we see but of what to feel, hear, smell and taste.     When we take a real photo with a camera, therc is much to do before the photo is finished and ready to show to our friends.  In the same way, there is

much work to be done before we can keep a picture for ever in our minds. Memory is the diary we all carry

about with us.

1. Some people are good at_____     

A. learning long poems              

B. remembering things          

C. taking photos                  

D. keeping a diary

2. Other people can only remember things by_____   

A. saying again and again          

B. hearing, smelling and tasting          

C. learning a foreign language      

D. keeping a picture

3. Charles Dickens_____      

A. didn't live in his own country          

B. had a very good camera          

C. spoke two foreign languages as easily as English          

D. had a very good memory

4. A good memory helps you _____       

A.  keep a picture for ever          

B.  tell others the name of every shop in London         

C.  learn a language          

D.  hear, smell and taste

5.  Remembering things is rather like_____       

A: learning poems                

B. taking photos          

C. learning English              

D. feeling things

A、B、C、D、E是5个不同的整数，两两相加的和共有8个不同的数值，分别是17、25、28、31、34、39、42、45，则这5个数中能被6整除的有几个( )

A．0

B．1

C．2

D．3

下列租金的计算方法中，（）是在租赁资产的设备货价或概算成本上再加上一个特定的比率来计算租金。

A.附加率法

B.净年值法

C.净现值法

D.年金法

从H 、O 、 C 、N 、Ca 、五种元素中选择适当的元素按要求填空。

（1）用适当的数字和符号填空：

①三个氢氧根离子    ；

②二个醋酸分子      ；

③硝酸铵中显-3价的氮元素 　　

（2）写出符合下列要求的物质的化学式：

①水溶液呈碱性的氮肥是      ；

②作建筑材料的盐是               。

③溶于水后溶液呈碱性的气体        ；

滚动轴承的外圈与壳体孔配合是基孔制。