温度越高,碱液的黏度越大。

题型:判断题

问题:

温度越高,碱液的黏度越大。

考点:氯碱操作工考试氯碱操作工考试题库
题型:判断题

给出一元二次方程x2﹣8x+(    )=0的一个常数项,使方程有两个相等的实数根。

题型:判断题

稳定计算校核应用主要包括()。

A.静态稳定分析

B.暂态稳定分析

C.动态稳定分析

D.电压稳定分析

题型:判断题

2012年是我国社会主义市场经济体制确立20周年,我国的市场经济既有一般市场经济的共性,又有自己鲜明的特征。下列属于我国社会主义市场经济特点的是 

A.要遵循价值规律的要求

B.企业有自主经营权

C.能够促进科学技术和经营管理的进步

D.以共同富裕为根本目标

题型:判断题

如图所示,放在光滑水平面上的木块受到两个水平力的作用而静止不动,现保持不变,使逐渐减小到零,再逐渐恢复到原来的大小,在这个过程中,在速度图像、加速度图像、位移图像中,能正确描述木块运动情况的是

[ ]

A.

B.

C.

D.

题型:判断题

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.

更多题库