Apple iPad2 Size: 9.7 inch screen, 8.8mm thick Weight: 601g (Wi-Fi only version) Battery life: 10 hours of heavy use Price: a base price of $499(3,278yuan) Available(可使用的): March 11, 2011 in the US Strength: over 65,000 *apps that are fit for the iPad Weakness: lack of USB port and flash support |
Motorola Xoom Size: 10.1 inch screen, 13mm thick Weight: 730g Battery life: 8hours of heavy use Price: $800(5,252RMByuan) Available: now Strength: great multi-tasking feature, better cameras than the iPad2 Weakness: limited options(选择权)of apps |
HP Touchpad Size: 9.7 inch screen, 13mm thick Weight: 740g Battery life: 8hours of heavy use Price: not yet announced Available: summer 2011 Strength: killer software features, including a virtual(虚拟的) keyboard which comes in four sizes Weakness: lack of a rear-mounted(后置式) camera which would allow users to get images and photos |
BlackBerry PlayBook Size: 7- inch screen, 10mm thick Weight: 400g Battery life: 8hours of heavy use Price: not yet announced Available: Spring 2011 Strength: business-oriented, powerful multitasker, excellent data security(安全) Weakness: Some features require users to have a Black-Berry phone |
A.Apple iPad 2 | B.Motorola Xoom | C.HP Touchpad | D.BlackBerry PlayBook |
A.Apple iPad 2 | B.Motorola Xroom | C.None of the four | D.Any of the four |
A.A union for listing animals and plants on the earth |
B.A group of volunteers who are interested in wildlife |
C.An organization concerning the protection of rare species" survival |
D.A government made up officials, scientists and experts |
A.All the protection methods can’t work. |
B.The IUCN does most of the protection. |
C.The efforts China makes has paid off. |
D.Enough is done in wildlife protection. |
A.Bad weather | B.Over-hunting | C.Warmer oceans | D.Habitat destruction |
A.China has been paying great attention to protecting the natural resources. |
B.China has set up a lot of natural reserves. |
C.The natural reserves in China cover more than 15 percent of the nation"s land area. |
D.The rate of China"s natural reserves is lower than the average of the world. |
A.discovered Cai Lun invented paper | B.learned to make paper |
C.saw many wonderful things | D.read a lot of books |
A.To use both sides of every piece of paper |
B.To use fewer paper bags when shopping |
C.To use cotton handkerchiefs instead of paper ones |
D.To grow more trees |
A.If we keep on wasting paper, we will have no paper to use one day. |
B.The Chinese used paper money much earlier than people in western countries. |
C.About 48,000 trees can be used to make 2,800 tons of paper. |
D.It is never too late to plant trees for paper. |
A.Saving Paper | B.The History of Paper |
C.Cotton Handkerchiefs Back Again | D.Cai Lun, the Inventor |
A.man desires to explore what is unknown |
B.man often goes wherever his dreams go |
C.man is no longer interested in the study of the land and sea now |
D.man’s history is the exploration of the world |
A.vast | B.various | C.valuable | D.practical |
A.doubting the necessity of the space exploration |
B.the exploration of space |
C.exploring more in space than in the sea |
D.his experience in space |
A.learn how to make things such as fishing nets |
B.realize the importance of travelling |
C.learn something about different places in the world |
D.become familiar with mountain countries |
A.the Safari Park | B.the Travel Pavilion |
C.the Future Tower | D.the Pyramid |
A.The Pyramid. | B.The Future Tower. |
C. The Nature Park. | D.The Travel Pavilion. |
A.combined | B.contributed | C.doubled | D.produced |
A.Egyptians had probably travelled to China to buy silk |
B.new light can now be thrown on ancient trading practices |
C.historical research often achieves fascinating results |
D.trade along the Silk Road began earlier than once thought |
A.began a million years ago |
B.primarily benefited the Egyptians |
C.originated in the 2nd century BC |
D.extended human migration into eastern Asia |
A.he discovered the Silk Road |
B.he helped establish East-West trade |
C.he travelled as far as Afghanistan |
D.he brought back knowledge of Rome to the emperor |
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