为什么绘图桌的课桌面往往设计成倾斜面?

题型:问答题 简答题

问题:

为什么绘图桌的课桌面往往设计成倾斜面?

考点:人体工程学人体工程学题库
题型:问答题 简答题

“地狱沉沉二百年,忽遇天王洪秀全;满人逃往热河边,曾国藩来做汉 * * ……”(章太炎)章太炎对洪、曾两人的历史评价不同,主要着眼于  [ ]

A.洪破除旧迷信,曾尊孔扬孟

B.洪主张男女平等,曾主张男尊女卑

C.洪反清闹革命,曾为满效力

D.洪代表农民阶级,曾代表地主阶级

题型:问答题 简答题
如图所示,两根相距为l的平行直导轨ab、cd、b、d间连有一固定电阻R,导轨电阻可忽略不计;MN为放在ab和cd上的一导体杆,与ab垂直,其电阻也为R;整个装置处于匀强磁场中,磁感应强度的大小为B,磁场方向垂直于导轨所在平面(指向图中纸面内);现对MN施力使它沿导轨方向以速度v(如图)做匀速运动;令U表示MN两端电压的大小,则(  )

A.U=vBl,流过固定电阻R的感应电流由b到d

B.U=vBl,流过固定电阻R的感应电流由d到b

C.U=vBl,流过固定电阻R的感应电流由b到d

D.U=vBl,流过固定电阻R的感应电流由d到b

题型:问答题 简答题

阅读理解。

     Today, there's hardly an aspect of our life that isn't being upended (颠覆) by the tons of information

available on the hundreds of millions of sites crowding the Internet, not to mention its ability to keep us in

constant touch with each other via electronic mail. "If the automobile and aerospace technology had

exploded at the same pace as computer and information technology," says Microsoft, "a new car would

cost about $ 2 and go 600 miles on a small quantity of gas. And you could buy a Boeing 747 for the cost

of a pizza."

     Probably the biggest payoff, however, is the billions of dollars the Internet is saving companies in

producing goods and serving for the needs of their customers. Nothing like it has been seen since the

beginning of the Industrial Revolution, when power-driven machines began producing more in a day than

men could turn out in nearly a year. "We view the growth of the Internet and e-commerce as a global

trend," says Merrill Lynch, "along the lines of printing press, the telephone, the computer, and electricity."

     You would be hard pressed to name something that isn't available on the Internet. Consider: books,

health care, movie tickets, construction materials, baby clothes, stocks, cattle feed, music, electronics,

antiques, tools, real estate, toys, autographs of famous people, wine and airline tickets. And even after

you've moved on to your final resting place, there's no reason those you love can't keep in touch. A

company called FinalThoughts.com offers a place for you to store "afterlife e-mails" you can send to

Heaven with the help of a "guardian angel".

     Kids today are so computer literate that it in fact ensures the United States will remain the

unchallenged leader in cyberspace for the foreseeable (能预测的) future. Nearly all children in families

with incomes of more than $75,000 a year have home computers, according to a study by the David and

Lucile Packard Foundation. Youngsters from ages 2 to 17 at all income levels have computers, with 52% of those connected to the Internet. Most kids use computers to play games (some for 30 hours or more

a week), and many teenage girls think nothing of rushing home from school to have e-mail chats with

friends they have just left.

     What's clear is that, whether we like it or not, the Internet is an ever growing part of our lives and

there is no turning back. "The Internet is just 20% invented," says cyber pioneer Jake Winebaum. "The

last 80% is happening now."

1. What can we learn from the Microsoft's remark?

A. Today's cars and airplanes are extremely overpriced.

B. Information technology is developing at an amazing speed.

C. Information technology has reached the point where improvement is difficult.

D.There's more competition in information technology industry than in car industry.

2. The author gives the example of FinalThoughts.com to make the point that____.

A. there are some genius ideas on the Internet

B. almost anything is available on the Internet

C. people can find good bargains on the Internet

D. some websites provide novel services to increase hits

3. What can we learn from the fourth paragraph?

A. There is a link between income and computer ownership.

B. Many American children don't put computers to good use.

C. Studies show that boys are more computer literate than girls.

D. The U.S. will stay ahead in the information technology in years.

4. Which sentence has the phrase that possesses the same meaning as the one underlined

    in the fifth paragraph?

A. Some can tell you that he has changed their lives, while others think nothing of him.

B. Think nothing of it. It was my pleasure.

C. He thinks nothing of staying up all night in the Caf? bar.

D. He thinks nothing of the pain in his back for the moment.

5. What is the message the author intends to convey?

A. The Internet is going to get firm hold of our lives some day.

B. The Internet is going to influence our lives even more greatly.

C. We should have a positive attitude towards the changes the Internet brings.

D. Children should be well prepared for the challenges in the information age.

题型:问答题 简答题

对小群体的定义是()。

A.人数不多

B.群体成员之间有直接的个人交往和接触

C.群体的成员由共同的活动结合在一起

D.群体成员之间发生感情上的相互关系

E.他们的行为受群体中形成的规范所调节

题型:问答题 简答题

男性,30岁,耳后痛2天,嘴向右歪1天,面部针刺觉正常,无眼震,四肢肌力佳,行走平稳。这病人最可能伴有的体征是:

A.左侧眼睑不能闭合
B.右侧眼睑不能闭合
C.右侧眼球外展受限
D.左侧眼球外展受限
E.二眼向右凝视障碍

更多题库