问题 问答题 简答题

通常显示器分为几种?它们各有哪些主要的技术参数?

答案

参考答案:

2种,分别是CRT显示器和LCD(液晶显示器)显示器。

CRT显示器的技术参数有:(1)显像管;(2)显像管的大小和可视尺寸;(3)点距;(4)最大分辨率;(5)刷新频率;(6)扫描方式;(7)显示器的辐射标准;(8)“能源之星”标准。

LCD显示器的主要技术指标和CRT显示器类似,主要有:(1)点距;(2)分辨率;(3)亮度和对比度;(4)响应时间;(5)最大色彩数;(6)刷新频率;(7)坏点。

完形填空

阅读以下人物情况和书籍介绍,请选择适合他们的书籍。其中有一项是多余项。

小题1:Next Saturday is Peter’s grandfather’s birthday. As the old man is seventy-five years old, he often feels pain in his knees and back. Peter intends to buy his grandfather a book which will help him keep healthy.

小题2:Helen’s son is very active in sports and he wishes to be a famous football player in the future. Helen decided to buy a book for her son so that he can know the life of famous people and learn valuable lessons.

小题3:Last month Catherine’s mother was told that she was suffering from lung cancer. Since then the woman has been in low spirits. Catherine tries to get a book to encourage her mother to fight against cancer.

小题4:Elizabeth likes running very much as she knows that running can help people keep healthy and strong. Now she is going to buy a book which can tell her how to run in a scientific way.

小题5:Levin is a cyclist and he often rides his bicycle to the countryside to spend his holidays. Now he needs a book from which he can learn how to repair his bicycle.

A.FirstThingsFirst: TheRulesofBeingaWarner

The book contains very inspiring stories of famous people which will teach you very simple and meaningful lessons. Enjoy their stories and see what life is like in the spotlight and how they handle fame and fortune. See how they help others by donating their time, money and energy.

B.ItsNotabouttheBike

So much more than an athlete’s biography, this is a wonderfully told story about the victory of the human spirit. The detailed description of Lance’s illness, treatment, and recovery is truly inspiring. The book gives you an insight (洞悉) into Lance’s childhood, his love life, his amazing journey into fatherhood, and his role as a cancer activist.

C.ThinkLikeaHorse

The book provides information about the horse, its history and the way it thinks. It helps you promote horse awareness and have a better understanding of the horse, which hopefully improves the life of the horse.

D.TheBicyclingGuidetoCompleteBicycleMaintenanceandRepairThe book contains all the latest models, repair techniques, and money-saving tips to keep any ride in tiptop (一流的)shape. Beginners and experienced cyclists alike can depend on this book to get their bikes out of the shop faster and keep them on the road longer. If you are a cyclist, this is the best book for you.

E. DanielsRunningFormula

It’s a very good and useful book. It offers a truly scientific way of training. Each and every point is thoroughly explained. A book like this is an absolute delight for the thinking runner who not only wants to know what to do, but also why.

F. ChiWalking: FitnessWalkingforLifelongHealthandEnergy

In Chi Walking, Danny and Katherine Dreyer teach the walking technique they created that turns walking into deeply rewarding. It provides tips for increasing energy and strength and keeping healthy.

多项选择题