解方程： ①x2-2x=15 ②x2-3x+1=0． ③（x-1）2-5（x-1

所谓金融期货，是指以（）作为标的物的期货合约。

A.美元

B.国库券

C.金融工具

D.股票

阅读理解

     The early 1900s were very different from today. Toys, though they have evolved in many ways, were

still the delight of children everywhere.

     Theodore Roosevelt's Presidency marks the beginning of the "Teddy Bear". In the year 1902, toy

bears were named "Teddy" after the president's nickname. The Teddy Bear became known worldwide,

and is still known and loved today.It was only a few years later that the Teddy Bears were mass

produced.

     In 1913, an item called the Erector Set was invented.It was a steel, motorized toy that children could

use to build models of anything. Its creator was A. C. Gilbert, a medical doctor.

     Charles Pajeau created a similar wooden set called Tinker Toys in the year 1914. Tinker Toys were

made for younger children.

     Raggedy Ann dolls first came on the scene after newspaper cartoonist Johnny Gruelle reproduced the

doll he made for his daughter.That was in 1915.

     The following year，an architect's son named John Lloyd Wright, invented Lincoln Logs, which were

interlocked to make structures.

     Two years after Mickey Mouse was created, stuffed(填塞)Mickey Mouse dolls were made by

Charlotte Clark. This was the start of Disney merchandise.

     The yoyo became popular in the United States after Donald Duncan bought a yoyo company in

1929.

     The ViewMaster, a three dimensional viewer, was developed by a camera enthusiast named William

Gruber.The toy became popular when Gruber licensed Disney characters to make still, 3D images from

Disney movies and television programs.

     Finally, in 1940, model airplanes were mass produced. They started out as a way for manufacturers

to sell planes to the military, but later caught on as a toy.

     The toys that we know and love today have had their roots from these ancient times. Isn't it

interesting to know that if it hadn't been for all these creative people, most of the games you know today

would never have been?

1. Why were toy bears named "Teddy"?

A. To be suitable for mass production.

B. To be easily pronounced by children.

C. To meet the advertisers' needs.

D. To memorize President Theodore Roosevelt.

2. In which aspect do the toys created by Gilbert differ from those by Charles?

A. Shape.  

B. Material used.

C. Themes.  

D. Price.

3. When did the ViewMaster become popular?

A. After William Gruber was born.

B. After Gruber licensed Disney characters.

C. Two years after Mickey Mouse was created.

D. When Disney merchandise was started.

4. From the last paragraph we can learn that________.

A. those people who created these games should never be forgotten

B. some toys created in ancient times now disappear

C. creativity exists in every field all the time

D. toys nowadays are totally different from those in ancient times

5. What does the passage talk about?

A. The function of toys.

B. The history of Disney characters.

C. Toys in the early 1900s.

D. The financial meaning of toys.

女性，40岁，体检：先后2次测量血压为140／90mmHg，尿蛋白（±）。按我国的高血压诊断标准可诊断为（）

A.原发性高血压

B.肾性高血压

C.血压升高

D.临界高血压

E.正常血压

零件加工精度包括尺寸精度、（）精度、及（）精度等三顶内容。