题目内容
In summer, millions of people will head for the beach．And while the ocean can be a great place to swim and play, it may also be useful in another way. Some scientists think that waves could help make electricity．
“Have you ever been on a surfboard or boat and felt yourself being lifted up by a wave? Or have you jumped in the water and felt the energy as waves crashed over you?” asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh in Scotland．“There is certainly a lot of energy in waves．”
Scientists are working on using that energy to make electricity．Most waves are created when winds blow across the ocean．“The winds start out by making little ripples (波纹) in the water, but if they keep on blowing , those ripples get bigger and bigger and turn into waves, ” Taylor said．“Waves are one of nature’s ways of picking up energy and then sending it off on a journey．”
When waves come towards the shore, people can set up dams or other barricades to block the water and send it through a large wheel called a turbine (涡轮) ．The turbine can then power an electrical generator (发电机) ．
The United States and a few other countries have started doing research on wave energy , and it is already being used in Scotland．
The resource is huge．We will never run out of wave power, besides, wave energy does not create the same pollution as other energy sources, such as oil and coal．
Oceans cover three quarters of the earth’s surface．That would make wave power seem perfect for creating energy around the world．There are some drawbacks, however．
Jamie Taylor said that wave power still cost too much money．He said that its effects on animals in the sea were still unknown．Plus, wave power would get in the way of fishing and boat traffic．
With more research, however, “many of these problems might be overcome,” Taylor said．“Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is growing quickly throughout the world．Finding more energy sources is very important, for traditional sources of energy like oil and gas may run out some day．”
In the future, when you turn on a light switch, an ocean wave could be providing the electricity!
1.Which of the following is NOT true?
A．Wave power costs too much money．
B．Wave energy creates the same amount of pollution as other energy sources．
C．Wave power affects fishing and boat traffic．
D．Wave power may affect marine animals．
2.We can infer from the passage that ______．
A．finding new energy sources like wave energy is important
B．wave energy is a resource that will never run out and is used all over the world
C．wave power is perfect for creating energy around the world
D．wave power doesn’t create any pollution
3.The underlined word “drawbacks” in the seventh paragraph probably means______．
A．regrets B．adventures
C．disadvantages D．difficulties
4.What can be the best title for the passage?
A．How to Get Electricity by Waves．
B．A Huge Resource of Energy．
C．Can Waves Make Electricity?
D．The Disadvantages of Wave Energy．
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将选项涂黑。
A
Gallery Policies for Visitors to National Gallery of Art, Washington | |
Visitors must present all carried items for inspection upon entry． After inspection, all bags, backpacks, umbrellas, parcels, and other things as determined by security officers must be left at the checkrooms, free of charge, close to each entrance．All oversized bags, backpacks, and luggage must be left at the checkrooms near the 4th Street entrance of either the East or West Building．These items will have to be x-rayed before being accepted．Items of value, such as laptop computers, cameras, and fur coats, may not be left in the checkrooms but may be carried into the galleries． We regret that we do not have enough space for visitor items larger than 17×26 inches into the Gallery or its checkrooms． Additional security procedures and checks may be taken according to the decision of the Gallery． | For the safety of the artworks and other visitors, nothing may be carried on a visitor’s back．Soft front baby carriers are allowed, but children may not be carried on shoulders or in a child carrier worn on the back．Pushchairs(童车) are available free of charge near each checkroom． Smoking is prohibited．Food and drink are not permitted outside the food service areas．Unopened bottled water may be carried only in a visitor’s bag．Cell phones may not be used in the galleries． Animals, other than service animals, are not permitted in the Gallery． Skateboarding is prohibited． Picture-taking (including video) for personal use is permitted except in special exhibitions and where specifically prohibited．Tripods (三角架) are not allowed． Please do not touch the works of art． |
1.When people come to visit the Gallery, they should _______．
A．leave all their carried items at the checkrooms
B．have all their carried items x-rayed at the entrance
C．take all their carried items with them without inspection
D．have all their carried items inspected at the entrance
2.Parents with small children visiting the Gallery __________．
A．can carry their children in soft front child carriers
B．can carry their children on their shoulders
C．can carry their children in carriers worn on the back
D．ought to pay if they want to use pushchairs for their children
3.Visiting photographers should make sure that _______．
A．pictures and videos are allowed for personal use anywhere in the gallery
B．pictures and videos can be taken in some places for personal use
C．picture-taking and videoing are totally forbidden in the Gallery
D．tripods are allowed except in some special exhibitions