24.There are no vitamins, no minerals and no fibers in ____.

　　A) natural foods C) sugar

　　B) animal meats D) fruit

　　25.“Yet all it does is provide us with energy, in the form of calories.” It means ____.

　　A) processed food provides us with energy

　　B) natural food furnishes us with vitamins and minerals

　　C) sugar gives us enough energy in the form of calories

　　D) fiber helps us to digest food

　　Questions 26 to 30 are based on the following passage:

　　With a tremendous roar from its rocket engine, the satellite is sent up into the sky. Minutes later, at an altitude of 300 miles, this tiny electronic moon begins to orbit about the earth. Its radio begins to transmit an astonishing amount of information about the satellite's orbital path, the amount of radiation it detects, and the presence of meteorites. Information of all kinds races back to the earth.No human being could possibly copy down all these facts, much less remember and organize them. But an electronic computer can.

　　The marvel of the machine age, the electronic computer has been in use only since 1946. It can do simple computations—add,subtract, multiply and divide—with lighting speed and perfect accuracy. Some computers can work 500,000 times faster than any person can.

　　Once it is given a “program” — that is, a carefully workedout set of instructions devised by a technician trained in computer language — a computer cagather a wide range of information for many purposes. For the scientist it can get information from outer space or from the depth of the ocean. In business and industry the computer prepares factory inventories, keeps track of sales trends and production needs, mails dividend checks, and makes out company payrolls. It can keep bank accounts up to date and make out electric bills. If you are planning a trip by plane, the computer will find out what to take and what space is available.

　　Not only can the computer gather facts, it can also store them as fast as they are gathered and can pour them out whenever they are needed. The computer is really a highpowered“memory” machine that “has all the answers”—or almost all.Besides gathering and storing information, the computer can also solve complicated problems that once took months for people to do.

　　At times computers seem almost human. They can “read” handprinted letters,play chess, compose music, write plays and even design other computers. Is it any wonder that they are sometimes called “thinking” machines?

　　Even though they are taking over some of the tasks that were once accomplished by our own brains, computers are not replacing us at least not yet. Our brain has more than 10 million cells. A computer has only a few hundred thousand parts.

　　For some time to come, then, we can safely say that our brains are at least 10,000 times more complex than a computer.How we use them is for us, not the computer, to decide.

　　26.In the first paragraph, the author thinks an electronic computer can ____.

　　A) copy down all the facts

　　B) remember all the facts

　　C) organize the facts and everything

　　D) copy down, remember and organize all the facts

　　27.“Program” means ____.

　　A) a plan of what is to be done

　　B) a complete show on a TV station at a fixed time table

　　C) a scheduled performance

　　D) series of coded instructions to control the operations of a computer

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