题目内容
（请给出正确答案）
How does light pollution affect wildlife？
A．Animals may go off course.
B．It helps migrating birds find their homes.
C．Animals are afraid to go out after sunset.
D．It helps birds fall asleep.
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更多“How does light pollution affec…”相关的问题
34 How does light pollution affect wildlife？
A Animals may go off course.
B It helps migrating birds find their homes.
C Animals are afraid to go out after sunset.
D It helps birds fall asleep.
How does light pollution affect wildlife？ Which of the following is NOT correct？
A．Animals may go off course due to the attraction of artificial lights.
B．Animals might be attracted by artificial lights m go into cities.
C．Artificial lights at night may make migrating birds lose their way.
D．Attracted by artificial lights, birds fly into lighted buildings.
How is the quartz heater different from other types of heaters？
A．It heats only the objects in a room.
B．It is lighter in weight.
C．It heats the room quicker.
D．It is more common.
听力原文：Interviewer: What's the name of your company？
Interviewee: The Atlas Copco Group.
Interviewer: What line of business are you in？
Interviewee: We're in the mining and industrial sector.
Interviewer: What goods or services does your company provide？
Interviewee: We make compressors and other equipment for the mining and construction industries.
Interviewer: How many employees does your company have？
Interviewee: Over 21,000 world-wide.
Interviewer: Where are your headquarters？
Interviewee: In Sweden, in the capital, Stockholm.
Interviewer: Where are your main markets？
Interviewee: Well, we operate world-wide, but our main market is the Europe Union.
(20)
A．The mining industry.
B．The service industry.
C．The construction industry.
D．The light industry.
请根据短文的内容，回答题。
Computer Mouse
The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to point at things on the computer and it is very productive. Think of all the things you can do with a mouse like selecting text for copying and pasting, drawing, and even scrolling on the page with the newer mice with the wheel. Most of us use the computer mouse daily without stopping to think how it works until it gets dirty and we have to learn how to clean it. We learn to point at things before we learn to speak, so the mouse is a very natural pointing device. Other computer pointing devices include light pens, graphics tablets and touch screens, but the mouse is still our workhorse.＜br＞
The computer mouse was invented in 1964 by Douglas Engle hart of Stanford University. As computer screens became more popular and arrow keys were used to move around a body of text, it became clear that a pointing device that allowed easier motion through the text and even selection of text would be very useful. The introduction of the mouse, with the Apple Lisa computer in 1983,really started the computer public on the road to relying on the mouse for routine computer tasks.＜br＞
How does the mouse work？ We have to start at the bottom, so think upside down for now. It all starts with the mouse ball. As the mouse ball in the bottom of the mouse rolls over the mouse pad, it presses against and turns two shafts. The shafts are connected to wheels with several small holes in them. The wheels have a pair of small electronic light-emitting devices called light-emitting diodes (LED) mounted on either side. One LED sends a light beam to the LED on the other side. As the wheels spin and a hole rotates by, the light beam gets through to the LED on the other side. But a moment later the light beam is blocked until the next hole is in place. The LED detects a changing pattern of light, converts the pattern into an electronic signal, and sends the signal to the computer through wires in a cable that goes out of the mouse body. This cable is the tail that helps give the mouse its name. The computer interprets the signal to tell it where to position the cursor on the computer screen.＜br＞
So far we have only discussed the basic computer mouse that most of you probably have or have used. One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts.
Most computer users want to know how the computer mouse works. 查看材料
A.Right
B.Wrong
C.Not mentioned
Universal Product Code
What are the zebra stripes (See the figure) on the Instant Mashed Patato Flakes package？ They are special black and white vertical lines. These black and white stripes can be read by an optical scanner, or computer. The "scanner", which reads the lines of code, is a small laser beam of light. When the light rays is broken by the black stripes, the computer "reads" the information about the product.
This code is called the Universal Product Code (UPC). It is designed to add speed and efficiency to stores by using computers. It can do this in several ways. First, it is not necessary for workers to put individual prices on items. By using UPC, the computer can print out the accurate price of the item. Errors in prices are eliminated, or done away with. Also, the time spent checking out is reduced UPC gives an itemized receipt to the customer with all the items, prices, and totals. The store clerk does not need to spend time checking the price on the item and punching it into the cash register. This UPC computerized system will probably save as much as 45 percent of the checkout clerk's time.
What do the stripes mean？ How does the computer interpret the stripes？ The number printed below the vertical bars identifies the manufacturer and the manufacturer's item. As many as 10 trillion individual machine-readable numbers can be used with this system. In the example, the 0 on the left side means that it is a grocery item. The numbers 36800 indicate the manufacturer, in this case it is the Food Club Company. The last five digits, 51512, mean it is a pack of mashed patato flakes. The light rays from the light beam read these lines, and the message is sent directly to the computer. The computer then finds the information about this product (price, inventory data) and sends it instantly back to the terminal at the checkout counter. At the same time, it keeps an inventory for the store manager. Many products have labels with these stripes.
The figures printed below the stripes are codes of the producer and the product.
A．right
B．wrong
C．Doesn't say
Computer Mouse
The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to point at things on the computer and it is very productive. Think of all the things you can do with a mouse like selecting text for copying and pasting (涂), drawing, and even scrolling on the page with the newer mice with the wheel. Most of us use the computer mouse daily without stopping to think how it works until it gets dirty and we have to learn how to clean it. We learn to point at things before we learn to speak, so the mouse is a very natural pointing device. Other computer pointing devices include light pens, graphics (图形) tablets and touch screens, but the mouse is still our workhorse.
The computer mouse was invented in 1964 by Douglas Englehart of Stanford University. As computer screens became more popular and arrow keys were used to move around a body of text, it became clear that a pointing device that allowed easier motion through the text and even selection of text would be very useful. The introduction of the mouse, with the Apple Lisa computer in 1983, really started the computer public on the road to relying on the mouse for routine (常规) computer tasks.
How does the mouse work？ We have to start at the bottom, so think upside down for now. It all starts with the mouse ball. As the mouse ball in the bottom of the mouse rolls over the mouse pad, it presses against and turns two shafts (轴). The shafts are conneected to wheels with several small holes in them. The wheels have a pair of small electronic light-emitting devices called light-emitting diodes (LED) mounted on either side. One LED sends a light beam to the LED on the other side. As the wheels spin and a hole rotates by, the light beam gets through to the LED on the other side. But a moment later the light beam is blocked until the next hole is in place. The LED detects (发现) a changing pattern of light, converts the pattern into an electronic signal, and sends the signal (发信号) to the computer through wires in a cable that goes out the mouse body. This cable is the tail that helps give the mouse its name. The computer interprets the signal to tell it where to position the cursor on the computer screen.
So far we have only discussed the basic computer mouse that most of you probably have or have used. One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts.
Most computer users want to know how the computer mouse works.
A．Right
B．Wrong
C．Not mentioned
W: A water purifier. You want to carry even more equipment with you on our hiking trip？
M: If it's light weight and saves work, yes. And this one fits that description.
W: Really. I bet it takes up a lot of room.
M: Not at all. It's straw, much like the ones you use or drink a soda or milk shake.
W: Really, that is small.
M: Yea, it's plastic, and has a series of mineral and chemical filters that strain harmful germs from water.
W: Yes, but how good a job can it do filtering the germs out of motionless pond water, or water from lakes and streams.
M: It's fantastic. It makes the water entirely germ free.
W: But what about salt or chemical pollutants that might be in the water？ Does it clean those out？
M: No, it does not remove salt and chemicals, but those are really not major concerns when we are out hiking and camping.
W: Hmm, how long will a straw last？
M: For about one hundred gallons but don't worry about measuring that large amount of water. There is a built-in safety feature.
W: I think I'll get one for my camping trip this weekend, It'll sure be carrying a lot of water or having to boil it at the camp site.
(20)
A．In restaurant.
B．On car tripe.
C．In science laboratory.
D．On camping trips.
A. Right
B. Wrong
C. Not mentioned
● Read the following passage.
● Are sentences 16-22 “Right” or "Wrong"？ If there isn't enough information to answer "Right" or "Wrong", choose "Doesn't say".
● For each sentence 16-22, mark one letter (A, B or C) on your Answer Sheet.
Universal Product Code
What are the zebra stripes (See the figure) on the Instant Mashed Patato Flakes package？ They are special black and white vertical lines. These black and white stripes can be read by an optical scanner, or computer. The "scanner", which reads the lines of code, is a small laser beam of light. When the light rays is broken by the black stripes, the computer "reads" the information about the product.
This code is called the Universal Product Code (UPC). It is designed to add speed and efficiency to stores by using computers. It can do this in several ways. First, it is not necessary for workers to put individual prices on items. By using UPC, the computer can print out the accurate price of the item. Errors in prices are eliminated, or done away with. Also, the time spent checking out is reduced UPC gives an itemized receipt to the customer with all the items, prices, and totals. The store clerk does not need to spend time checking the price on the item and punching it into the cash register. This UPC computerized system will probably save as much as 45 percent of the checkout clerk's time.
What do the stripes mean？ How does the computer interpret the stripes？ The number printed below the vertical bars identifies the manufacturer and the manufacturer's item. As many as 10 trillion individual machine-readable numbers can be used with this system. In the example, the 0 on the left side means that it is a grocery item. The numbers 36800 indicate the manufacturer, in this case it is the Food Club Company. The last five digits, 51512, mean it is a pack of mashed patato flakes. The light rays from the light beam read these lines, and the message is sent directly to the computer. The computer then finds the information about this product (price, inventory data) and sends it instantly back to the terminal at the checkout counter. At the same time, it keeps an inventory for the store manager. Many products have labels with these stripes.
The figures printed below the stripes are codes of the producer and the product.
A．Right
B．Wrong
C．Doesn't say
