It is well known that Thomas Edison _______ the electric lamp.
A. invented B. discovered C. found D. developed
高二英语单项填空简单题
It is well known that Thomas Edison _______ the electric lamp.
A. invented B. discovered C. found D. developed
高二英语单项填空简单题查看答案及解析
It is well-known that advertising is often the most effective method of .
A. promotion B. extension
C. contribution D. motivation
高二英语单项填空中等难度题查看答案及解析
It is well known that good relationship between two countries_____ the development of mutual culture and economy.
A．result from B．arise from C．contributes to D．leads to
高二英语单项填空简单题查看答案及解析
It’s well-known that ________ World Exposition in 2010 is quite ________success
A．不填; a B．the; a C．The; 不填 D．不填; the
高二英语单项填空简单题查看答案及解析
____ is known to all, persistence is a kind of quality and that’s ____ it takes to do anything well.
A. As; which B. It; which C. It; what D. As; what
高二英语单项填空中等难度题查看答案及解析
It is well known that Germany’s car industry is its beer.
A. as a symbol much as B. as much a symbol as
C. so much the symbol as D. so the symbol much as
高二英语单项填空中等难度题查看答案及解析
It is well known to car drivers that red means “stop”, green means “go” and yellow means “hurry up and make that damn light”. Why those colors, though? The answer lies in the fact that the earliest traffic signals were designed for trains, not cars. They were red and green, gas-powered, and more than a little dangerous in the event of a leak.
Red is an inherited (继承的) symbol from railroads, which symbolizes danger in many cultures. As red has a longer wavelength than any other color on the visible spectrum (光谱), it can be seen from a greater distance than other colors. Red has meant “stop” since long before cars existed, with train signals’ use of red dating back to the days when mechanical arms lifted and lowered to indicate whether the rail ahead was clear.
Green’s wavelength is next to (and shorter than) yellow’s on the visible spectrum, meaning it’s still easier to see than any color other than red and yellow. Back in the early days of railway lights, green meant “caution”, while the “all-clear” light was, well, clear or white. It is said that several disastrous collisions happened after an engineer mistook stars in the night for an all-clear. Thus, green became “go”, and for a long time, railways used only green and red to signal trains.
From the earliest days of motoring up until mid-1900s, not all stop signs were red-many were yellow, because at night it was all but impossible to see a red stop sign in a poorly lit area. In 1950 the yellow stop-sign craze began in Detroit, a city that five years later installed its first electric traffic signal, which happened to include the very first yellow traffic light.
But what of those mysterious yellow stop-signs? As materials and technologies evolved, the ability to produce highly reflective signs meant that red could resume its natural spot in the sign hierarchy (层次体系，等级体系), leaving the still-highly-visible yellow to the domain (领域) of “caution”. That’s why school zones and buses, crosswalks, and other important warnings are yellow today.
1.What’s the main reason for the color red’s long being used to mean “stop”?
A.It has the longest wavelength on the visible spectrum.
B.It represents danger in many cultures.
C.It can be seen even in the dark area.
D.People prefer red to other colors.
2.Which of the following may the author agree with?
A.The meaning of red is culture–specific.
B.Yellow functioned as stop signs in the 1900s.
C.Green’s wavelength is just second to that of red.
D.Green’s role in traffic lights has changed over time.
3.What does the passage mainly talk about?
A.The significance of road traffic signs.
B.The history of railroad transportation.
C.The symbolic meaning of different colors.
D.The origin and development of traffic lights.
高二英语阅读理解中等难度题查看答案及解析
It is well-known that ____ year 2006 saw many developments in ____ science and technology, with those in the field of space science being particularly notable.
A. /; / B. the; / C. the; the D. /; the
高二英语单项填空简单题查看答案及解析
1.One of his great __________(雄心) is to become a great poet.
2.It is well known that this film is a________ from the novel of the same title.
3.Out of s__________ for the homeless children, he gave them shelter for the night.
4.The woman has an __________(优雅的) manner, but she is extremely difflcult to work with.
5.He p_______ for breath and then continued climbing.
6.The college raises annual visits to China by groups of students in order to raise their _____________(意识) of the importance and benefits of learning Chinese.
7.The lost car of the Lees was found _________(遗弃) in the woods.
8.Our school encourages students to actively p__________ in the exchange program.
9.What he said was not __________(相关的) to our discussion at all.
10.In the move most of the furniture was left to neighbours or ___________(分发) among friends.
11.The library has an a________ supply of books, so don’t worry about not finding what you need.
12.Plastic parts can ____________(替代) for metal ones, but they don’t last long.
13.We have made an __________(调整) and given you a special discount.
14.Life is full of choices and ___________(矛盾), so always listen to your heart.
15.It was really annoying; I couldn’t get access to the website you _________(推荐).
高二英语单词拼写中等难度题查看答案及解析
It is well known that Germany’s car industry is ________ its beer.
| A．as a symbol much as | B．as much a symbol as |
| C．so much the symbol as | D．so the symbol much as |
高二英语单项填空中等难度题查看答案及解析