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问题描述：

[单选] 哺乳母猪饮水需要流速（）L/min；
A．1L/min B．1.5L/min C．2.0L/min D．2.5L/min
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随机题目

A Mr． Phillips was getting ready to leave his office． He remembered that his wife had asked him to buy some bananas． There was an old lady selling bananas at fruit stall（摊位） across the street． Mr． Phillips had never seen this stall before， so he went to check it out． He asked her how much her bananas cost， she said $8 per kilogram． He tried to bargain． “The store where I usually buy bananas only asks $5 per kg． Can you sell them to me for the same price？ He asked． The old lady was reluctant but finally agreed to sell them for $6 per kg． However， Mr． Phillips wasn"t satisfied and decided to buy them at the fruit store instead． He went inside， picked up a bunch of bananas and went to the cashier． He saw that the price was $10 per kg． He tried to bargain again， but the cashier said， “Sorry sir， we do not bargain here．” Mr． Phillips felt bad and went back to the old lady． She recognized him and told him， “Sir， I can"t offer you that price anymore．” Mr． Phillips told her， “Don"t worry about it． I will pay you $10 per kg! Please give me 2 kg．” The old lady was happy and said． “I can"t take $10． But I will take $7 per kg． I appreciate your kindness．” Later， Mr． Phillips recommended（介绍） the old lady’s fruit stall to his coworkers． And with support from Mr． Phillips and many other shoppers， she was able to make a better living． 1． Mr． Philips didn"t buy bananas from the old lady at first because（）．
BWhat is it that makes us different from machines？ We have created AI programs that can do many of the same things we can． There are software（软件） programs that can play chess， drive cars． and solve difficult math problems． But what about creative works？ Most art， music and poetry is inspired by emotion（情感）． And yet， we have indeed created AI that can produce creative works． In October 2018， famous auction（拍卖） house Christie’s auctioned off a painting named portrait of Edmond． The painting is not very famous， but it sold for $432，500（3 million yuan）! What made it so special？ The fact is that it was painted by an AI program written by Obvious， a group of artists in Paris， according to Artnet News． AI has entered the world of poetry as well． In April 2018， Chinese and Japanese researchers wrote an AI program that uses images（图像） to write poems． The AI looks at colors and shapes in an image and uses this information to write a poem． 500 human judges（评委） were asked whether they could tell if the poems were written by a human or a computer， 40% of the judges mistakenly thought the poems were written by a human， according to MIT Technology Review． But if AI can learn to create works of art like this， what place do humans have in the creative world？ The difference is that true art is almost always an expression of emotion - something that AI is still unable to feel． 4． Which of these activities requires creativity（创造力）？
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