题目内容
（请给出正确答案）
A.a torped0’s electric cells contain more than one electricDlates
B.to complete the circuit，you have to touch the fish in twoDlaces
C.the current in one place is not strong enough to give a shock
D.the fish’s electric cells are filled with jelly-like substance
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更多“（）Usually you will not get a shockBy touching the electric ray in one place onlyBe．cause_”相关的问题
A、signal-to-noise ratio
B、topology
C、signal intensity
D、noise intensity
A、symptom
B、signs
C、pain
D、the medicine
A、fruitful
B、futile
C、furious
D、lucrative
Windows not only let light in to cut down an electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associ-ate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between with a flip of a switch.
"It took us a long time to figure out what a window really is, " says Claes Granqvist. He's a pro- fessor of solid-state physics at Uppsala University in Sweden. "It's contact with the outside world. You have to have visual contact with the surrounding world to feel well. " So, windows and natural light are important for improving the way people feel when they're stuck indoors.
Yet,windows are the weak link in a building when it comes to energy and temperature control. In the winter, cold air leaks in. When it's hot and sunny, sunlight streams in. All of this sunlight carries lots of heat and energy. And all of this extra heat forces people to turn on their air conditioners. Produ- cing blasts of cold air, which can feel so refreshing, actually suck up enormous amounts of electricity in buildings around the world.
Windows have been a major focus of energy research for a long time. Over the years, scientists have come up with a variety of strategies for coating, glazing,and layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic technologies which involve changes of color.
Electrochromic windows use electricity to change color. For example,a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery. Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed,that is,when the amount of voltage is decreased, the window darkens until it's completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear or dark.
One important feature that makes a smart window so smart is that it has a sort of "memory". All it takes is a small jolt of voltage to turn the window from one state to the other. Then,it stays that way. Transitions take anywhere from 10 seconds to a few minutes,depending on the size of the win- dow. The development of smart windows could mean that massive air conditioning systems may no lon- ger need. "In the future, " Granqvist says,"our buildings may look different. "
Which of the following statements does not indicate the importance of windows as described in the first two paragraphs？
A.Windows can change from clear to dark to save energy
B.Windows help to save energy by letting light in
C.Windows help to save energy by providing heat
D.Windows enable people to have contact with the outside world
Everyone knows that the favorite food in the United States is the hamburger. It seems impossible, but people eat 34 billion hamburgers a year. This is enough to make a line of hamburgers around the world four times.
The favorite place to buy hamburgers is a fast-food restaurant. In these restaurants, people order their food, wait just a few minutes, and carry it to their tables themselves. They can eat it in the restaurant or take the food out and eat it at home, at work, or in a park. At some restaurants people can drive up beside a window. They order the food, and a worker hands it to them through the window. Then they eat in their cars.
Hamburgers are not the only kind of food that fast-food restaurants serve. Some serve fish, chicken, beef sandwiches, or Mexican food. They also serve fries, shakes (a drink made from milk and ice cream) , soft drinks and coffee.
Fast-food restaurants are very popular because the service is fast and the food is inexpensive. For many people, this is more important than quality of the food. These restaurants are also popular because the food is always the same. People have known that if they eat at a company' s restaurant in the north or south of the city, the food will be the same.
In a fast-food restaurant, people______.
A．stand up to eat
B．are served at table
C．eat in a hurry
D．serve themselves
The fast-food is convenient owing to the following factors except______.
A．it doesn't take you much time to have a meal
B．you can get a lot of salt and fat in your fast-food
C．you can take your order without leaving your car
D．you can take the food to anywhere you like
Fast-food restaurants are popular because______.
A．people are free to order their food
B．the quality of the food is good
C．it is cheaper and faster to have meals there
D．people can find fast-food restaurants everywhere
Which of the following sentences is not correct?
A．The service is fast and the food is cheap in fast-food restaurant.
B．Everyone likes eating fast food.
C．People can find the same food in all the restaurants.
D．People can take fast food out.
What" s the main idea of the passage?
A．Americans eat enough hamburgers to make a line around the world four times.
B．Fast-food restaurants are popular in the United States.
C．Some people can eat fast food in parks.
D．Mothers who work outside home often have meals in fast-food restaurants.
A.access
B.approach
C.accent
D.response
A.the 1990s; 450 km
B.the 1990; 450 km
C.the 1990s; 450 kms
D.the 1990; 450 kms
Chinese-Americans have had three Noble【43】winners, all in physics. Many more have PhDs, especially from high【44】universities. Among academics, Asians publish more than【45】blacks or whites.
(36)
A．employed
B．employee
C．employer
D．employing
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