The cows wear collars around their necks that identify them to the system.A computer keeps records on their eating and milking.A cow is released from the station if the computer decides it should not be milked.

The automated system also measures the temperature and color of freshly produced milk.Milk is thrown away if it does not pass the tests.

Professor Plaut believes the systems will appeal especially to the next generation of farmers.She means young people who are more interested in technology and less interested in working all the time on the farm.Still，she says the price of robotic milking systems will continue to limit their use.

Doug and Tina Suhr have more than 100 cows on their family farm.Last year it became the fourth farm in southeast Minnesota to get a robotic milking system.A recent story in a local agricultural newspaper said the first robot costs 175，000 dollars.The second costs 150，000 dollars.

Doug told AgriNews that wages that would have been paid for one employee in five years will pay for one robot.He says the increase in milk production reaches a high of more than six kilograms per cow per day.

【语篇导读】　随着科技的发展一些奶农利用机器人系统来给奶牛挤奶。________.解析　第一段开答案　A________.

A.adjust the temperature of milking stations

B.judge the quality of fresh milk

C.improve the appetite of cows

D.keep fresh milk for two weeks

解析　由第五段内容可知这个自动化系统还能测量新产出来的牛奶的温度和颜色。如果没有通过测试牛奶就被扔掉故答案为B项。答案　Bt in it.

B.Because it is difficult to learn how to use it.

C.Because people can't afford to buy it.

D.Because it usually causes the waste of milk.

解析　根据倒数第三段中的“Stillt their use.”可知它现在不答案　C～$175～$30～$35解析　根据最后一段中的“wages that would have been paid for one employee in five years will pay for one robot”可以大致计算出来。按每台175 000美元工人每年工资应为35 000美元;按每台150 000美元则工人每年工资为30 000美元。答案　DC.Improve the milk quality.

D.Drink fresh milk daily.

解析　本文主要介绍了一些奶农利用机器人系统来给奶牛挤奶的情况故应选A项。答案　A

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