A. Its collection.

　　B. Its building. C. Its location.

　　D. Its name.

　　30. What is learnt about the Met's collections?

　　A. They mainly come from Europe.

　　B. They cover arts of different times.

　　C. They are from European masters.

　　D. They are about antique weapons.

　　31. People built the Metropolitan Museum of Art_________.

　　A. to bring the worldwide artists’ dream into reality

　　B. to show the owners' pride in its large size

　　C. to invest and make more money in the future

　　D. to offer art education to the American people

　　D

　　Researchers have created a backpack that has a computer and medicines in it that can help even untrained soldiers save the lives of wounded troops. Wounded soldiers have a better chance of survival if they get help soon after being hurt and are quickly taken to a hospital or clinic. But soldiers who do not have medical training may not know how to help their injured friends.

　　Doctors and engineers have developed what they call an “intelligent backpack”. It has a computer and electronic measuring devices. The backpack also has robotic instruments and medicines ready to give to injured troops.

　　About 16 doctors and engineers from the University of Pittsburgh, Carnegie Mellon University and several other places are working on the project. The U. S. Department of Defense has given money to the project.

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