读英文回答问题 有选项When they think the rocks in a certain place may have oil,a metal tower is built.A machine in the tower cuts a hole down into the ground.At the same time,a steel pipe(钢管) is pushed down to stop the sides from fallin

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读英文回答问题 有选项When they think the rocks in a certain place may have oil,a metal tower is built.A machine in the tower cuts a hole down into the ground.At the same time,a steel pipe(钢管) is pushed down to stop the sides from fallin
读英文回答问题 有选项
When they think the rocks in a certain place may have oil,a metal tower is built.A machine in the tower cuts a hole down into the ground.At the same time,a steel pipe(钢管) is pushed down to stop the sides from falling in and to keep out water.At last if the men are right,usually the oil rushes up the sides with great force(力量) by pressure(压力)of the gas in the top of the rock,and it rushes high into the air.If oil catches a light,there will be a terrible fire.So a kind of cover is fixed on the top of the pipe,and the oil can run out through taps.(活塞)
61.People use a steel pipe because _____.
A.the pipe is strong enough to stand there
B.the pipe can cut a hole down into the ground
C.oil can run through the pipe
D.sides and water can be kept outside the pipe

读英文回答问题 有选项When they think the rocks in a certain place may have oil,a metal tower is built.A machine in the tower cuts a hole down into the ground.At the same time,a steel pipe(钢管) is pushed down to stop the sides from fallin
答案; D
解析:短文中有:At the same time,a steel pipe(钢管) is pushed down to stop the sides from falling in and to keep out water.
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读英文回答问题 有选项When they think the rocks in a certain place may have oil,a metal tower is built.A machine in the tower cuts a hole down into the ground.At the same time,a steel pipe(钢管) is pushed down to stop the sides from fallin what do people do when they go to the beach?用英文回答,不少于2句 Pumas never attack a human being except( )cornered?这新概念的老问题哈,可是好像谁都没说清楚.A.they areB.beingC.that they areD.when they are.except 加That从句 和when从句 这个选项中有什么区别哈,为什么一定要选D When will they meet?怎么回答? 回答问题的英文 请用英文回答Who invented the aeroplane?When were they born?Which is the longest river in China?准 Do you think children need to be supervised by parents when they are in a group 用英文回答几句谢and why?回答两三句 When is Easter?请用英文回答. 在帮我回答下问题,1.What do people often say in China when they ment?2.What do English peo...在帮我回答下问题,1.What do people often say in China when they ment?2.What do English people often talk about when they meet?3.Can you talk ab (回答问题)When is your winter holiday 回答问题的英文短语 回答问题的英文是什么? 用英文回答下列问题 In britain many children ( )wear uniform when they go to schoolA.must B have to 两者选项有什么区别吗,我选A, when is the Spring Festival?各位不是说翻译,是用英文来回答我的问题 高中生物有关必修一细胞部分的问题,有图关键是D选项,为什么错误.大家也只要回答d选项就可以了. What are they doing?Are they have lunch?这2句话哪里有问题吗请大家快回答 几道NCE里的问题people ran away to escape the tiger_____it was seen,有四个选项,我选的是as,答案是whereverPumas never attack a human being except_____cornerned.我选的being,答案是when they areThe experts were now fully convinced t