A.depend on one sense in choosing food |
B.a(chǎn)re not satisfied with their food |
C.choose food in similar ways |
D.eat entirely different food |
A.The white butterfly. | B.The small bird. |
C.The bear. | D.The fox. |
A.the season changes |
B.the food color changes |
C.they move to different places |
D.they are attracted by different smells |
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A.E-waste is being made good use of. |
B.E-waste, a big threat to us. |
C.E-waste is dangerous to us all the while. |
D.Goodbye, e-waste. |
A.Because they can go off at times and threaten us. |
B.Because they can make people sick, as long as people use them. |
C.Because they contain poisonous chemical substances. |
D.Because they take too much space when placed in trashes. |
A.Waste can’t be recycled. |
B.Waste can be made use of by recycling |
C.We have to recycle e-waste to protect the environment. |
D.Protecting the environment is important. |
A.Taking care of your electronics so they will last longer. |
B.Donating or selling your old high-tech equipment. |
C.Contacting a local or state environmental group. |
D.Asking fewer people to use electric products. |
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A.to serve for the research of weather predication |
B.to prepare for the wars against life from the universe |
C.to search for signals from intelligent life in space |
D.to observe exploding stars, black holes and other objects |
A.the 42 radio telescopes at Hat Creek observatory can work together |
B.the total cost of the project came from Paul Allen |
C.Hat Creek observatory can receive signals from all parts of the worm |
D.Hat Creek observatory is operated by an American named Paul Allen |
A.The Allen Telescope Array takes much more room than former telescopes. |
B.The Allen Telescope Array is still being built at present in the United States. |
C.Another 42 radio telescopes will be fixed in the Allen Telescope Array. |
D.The SETI Institute is against the search for other life forms in the universes. |
A.a(chǎn)stronomers can gather more information than before from other planets |
B.humans will have more chances to live on other planets than before |
C.humans will be able to find more natural resources on other planets |
D.scientists will be able to find more natural resources from other planets |
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A.it is one of the most difficult school courses |
B.students spend endless hours in reading |
C.reading tasks are assigned with little guidance |
D.too much time is spent in teaching about reading |
A.teachers can improve conditions at school for the students |
B.teachers can enable students to develop their own way of reading |
C.teachers can devise the most efficient system for reading |
D.teachers can make their teaching activities observable |
A.inquiry | B.observation | C.control | D.suspect |
A.children become highly motivated |
B.teacher and learner roles are interchangeable |
C.teaching helps children in the search for knowledge |
D.reading enriches children’s experience |
A.teachers should do nothing in helping students learn to read |
B.teachers should encourage students to read as widely as possible |
C.reading ability is something acquired rather than taught |
D.reading is more complicated than generally believed |
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A.temperature | B.water | C.oxygen | D.temperature , water and oxygen |
A.the sun | B.the earth | C.the moon | D.Mars |
A.Mars . | B.Moon . | C.Sun . | D.Mars and Moon . |
A.The earth has a history of about 4 million years . |
B.There is no air on Mars . |
C.The largest volcano on Mars is over three times higher than the highest one on the earth |
D.Scientists believe there are living things on Mars . |
A.Living Things on Our Earth | B.The Moon |
C.Living Things on the Moon | D.Mars Is Most Like the Earth |
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A.To show his bravery and make him a role model for teenagers. |
B.To arouse the American public’s interest. |
C.To help reform the spaceflight industry. |
D.To film an advertisement about space. |
A.A trip will return to Earth before finishing a lap. |
B.The whole trip will leave passengers weightless. |
C.Each trip can take 500 passengers. |
D.The trip will be too expensive even for celebrities. |
A.SpaceShipTwo will be the first to fly. |
B.Famous people will be the main passengers in the future. |
C.The space trip is still in preparation. |
D.Every space trip will be made into a film. |
A.space is too mysterious to explore |
B.the suborbital market is promising |
C.the spaceflight industry is more successful than people think |
D.developing the industry is risky |
A.To predict a change in the space market. |
B.To discuss a recent launch. |
C.To introduce the status of the spaceflight industry. |
D.To remove public doubt about the spaceflight industry. |
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A.Headache has no effect on others. |
B.Headache may cover the whole body. |
C.Headache may last several minutes or hours. |
D.Headache is just the tight feeling in the head. |
A.you should not advance in darkness whatever happens |
B.you’d better do nothing before you know how to deal with it |
C.you’d better still stand there without moving when it is dark at night |
D.you should take some pain-killers for your headache if you want to cover it up |
A.Treatments of headaches | B.The definition of headaches |
C.Symptom of headaches | D.Bad effects of a headache |
A.the reason of headache |
B.headache and its effect |
C.everyone suffers from a headache |
D.a(chǎn) headache is a symptom of something serious |
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A.learning about it from books |
B.going to a marine association |
C.a(chǎn)ttending marine biologists’ meetings |
D.taking part-time jobs at marine associations |
A.the advantage of learning at a marine association |
B.different activities offered by a marine association |
C.a(chǎn) marine association’s working conditions |
D.the way to develop children’s interest in ocean |
A.the way of explaining something |
B.the way of choosing a career |
C.a(chǎn) marine association’s working condition |
D.the way to develop children’s interest in the ocean |
A.Young children can enjoy indirectly what it is like to be a marine biologist at a marine association. |
B.To help your pupils to take care of the ocean, the best area to take them to is a marine association. |
C.Children can learn the topics more successfully when they experience them directly. |
D.A marine association has the same program for children of different ages. |
A.a(chǎn) teacher’s presentation |
B.a(chǎn) marine biologist’s report |
C.a(chǎn) student’s field trip journal |
D.a(chǎn)n introduction to a marine association |
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A.large animal were not easy to survive in the changing environment |
B.small species survived as large animals disappeared |
C.large sea animals may face the same threat today. |
D.Slow-growing fish outlive fast-growing ones |
A.the stock of large predators in some old fisheries has reduced by 90% |
B.there are only half as many fisheries are there were 15 years ago |
C.the catch sizes in new fisheries are only 20% of the original amount |
D.the number of larger predators dropped faster in new fisheries than in the old |
A.fishing technology has improved rapidly |
B.then catch-sizes are actually smaller then recorded |
C.the marine biomass has suffered a greater loss |
D.the date collected so far are out of date. |
A.people should look for a baseline that can’t work for a longer time |
B.fisheries should keep the yield below 50% of the biomass |
C.the ocean biomass should restore its original level. |
D.people should adjust the fishing baseline to changing situation. |
A.management efficiency |
B.biomass level |
C.catch-size limits |
D.technological application. |
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