C. comparing and exploring historical cases

　　D. telling in time order about one man’s research

　　11. If Loewi had thought of the experiment while awake, he would have _________.

　　A. asked someone else to do it

　　B. thought it was a bad idea

　　C. tried it out on his own

　　D. thought it was a wise idea

　　12. The author probably thinks that _________.

　　A. nervous feelings may stop someone thinking of useful ideas

　　B. dreaming is of very little value to most people

　　C. Loewi should not have conducted his experiment

　　D. college students should not try out dream experiments

　　D

　　Today just as technology changed the face of industry, farms have experienced an “agricultural revolution”. On the farm of today, machines provide almost all the power.

　　One of the most important benefits will be the farm computer. A few forward-looking farmers are already using computers to help them run their farms more efficiently. The computers help them keep more accurate records so they can make better decisions on what crops to plant, how much livestock (家畜) to buy, when to sell their products, and how much profit they can expect. Many computer companies have been developing special computer programs just for farmers. Programs are being written for pig producers, grain farmers, potato farmers, and dairy farmers. In the future, farmers will be able to purchase computer programs made to their needs. Because of the growing importance of computers on the farm, students at agricultural colleges are required to take computer classes in addition to their normal agricultural courses. There can be no doubt that farmers will rely on computers even more in the future. While the old-time farm depended on horse power, and modern farms depend on machine power, farms of the future will depend on computer power.

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