题目内容
（请给出正确答案）
The search engines work by means of _________.
A． arranging links to the Internet
B． submitting specific search term
C． updating a knowledge database
D． searching engine spiders
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更多“The search engines work by mea…”相关的问题
From the passage, we know that web directories are _________.
A． disorganized knowledge datawledge
B． more useful than search engines
C． arranged based on the topic
D． usually maintained automatically
听力原文：W: Hi, Mike.
M: Hi. I'm surprised to see you on the city bus. Why not drive your car？
W: (23)I've been thinking about the environment lately. If we all use public transportation when we could, the air will be much cleaner.
M: Right. But the bus isn't exactly pollution free.
W: True. But they'll be running a lot cleaner soon, We were just talking about that in my environmental engineering class.
M: What's the city going to do？ Install pollution filters of some sort on their buses？
W: They could, but those filters make the engines work harder and really cut down on fuel efficiency. Instead they found a way to make their engines more efficient.
M: How？
W: Well, (24)there is a material called the coniine oxide. It's a really good insulator. And a thick coat of it gets sprayed on the certain part of the engine.
M: An insulator？
W: Yes. (25)It reflects back the heat of burning fuel. So the fuel will burn much hotter and burn up more completely.
M: So a lot less unburned fuel comes out to pollute the air, right？
W: Yeah, and the bus will need less fuel. So with the savings on fuel cost, they say this will all pay for itself in just six months.
M: Sounds like people should all go out and get this stuff to spray their car engines.
W: Well, not really that easy. To melt the materials before you can spray a coat of it on the engine parts, you first have to heat it over 10,000 degrees. It's not something we are able to do ourselves.
(20)
A．Something is wrong with her car.
B．The cost of the fuel is high.
C．It's cheap to take bus.
D．She thinks public transportation is environmental friendly.
Part A
Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. (40 points)
Like the look of our website？ Whatever the answer, the chances are you made your mind up within the first twentieth of a second. A study by researchers in Canada has shown that the snap decisions Internet users make about the quality of a web page have a lasting impact on their opinions.
We all know that first impressions count, but this study shows that the brain can make flash judgments almost as fast as the eye can take in the information. "My colleagues believed it would be impossible to really see anything in less than 500 milliseconds", says Gitte Lindgaard of Carleton University in Ottawa. Instead they found that impressions were made in the first 50 milliseconds of viewing.
Lindgaard and her team presented volunteers with the briefest glimpses of web pages previously rated as being either easy on the eye or particularly unpleasant, and asked them to rate the websites on a sliding scale of visual appeal. Even though the images flashed up for just 50 milliseconds, roughly the duration of a single frame. of standard television shot, their decisions tallied well with judgments made after a longer period of examination.
In the crowded and competitive world of the web, companies hoping to make millions from e-commerce should take notice". Unless the first impression is favorable, visitors will be out of your site before they even know that you might be offering more than your competitors", Lindgaard warns.
For a typical commercial website, 60% of traffic comes from search engines such as Google. This makes a user's first impression even more critical. The lasting effect of first impressions is known to psychologists as the "halo effect": if you can snare people with an attractive design, they are more likely to overlook other minor faults with the site, and may rate its actual content more favorably.
This is because of "cognitive bias". People enjoy being right, so continuing to use a website that gave a good first impression helps to "prove" to themselves that they made a good initial decision. "It's awfully scary stuff, but the tendency to jump to conclusions is far more widespread than we realize".
These days, enlightened web users want to see a "puritan" approach. It's about getting information across in the quickest, simplest way possible. For this reason, many commercial websites now follow a fairly regular set of rules. For example, westerners tend to look at the top-left corner of a page first, so that's where the company logo should go. And most users also expect to see a search function in the top right.
Of course, the other golden rule is to make sure that your web pages load quickly, otherwise your customers might not stick around long enough to make that coveted first impression. "That can be the difference between big business and no business".
The study in the text has shown that the first impression of a website is ______
A．made within a period when the eyes even cannot really catch anything.
B．not possible to be created in less than half a second.
C．able to be made in 1/20 of a second.
D．usually related to the articles of the website.
Fire engines and ambulances have ______ over othertraffic.
A) priority
B) urgency
C) superiority
D) emergency
Solid-fuel engines are simpler than liquid-fuel engines, ______have important uses.
A．both of them
B．both
C．both of which
D．both all
A、sends
B、to send
C、to be sent
D、sending
A.3-side rotor
B.gasoline
C.spark plugs
D.diesel
Pistons for modern engines are made of _______.
A cast iron
B steel
C aluminum-alloy
D tin-alloy
