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Debate is a valuable way to practise communicating．It can also bring long-lasting rewards,especially?for people working with Western businesses．The main activity of debate is presenting one′s opinion and?supporting it with evidence,such as statistics or facts．It is a way of persuasive communication．
Charles Lebeau helped create the“Discover Debate”method．He says debate is important to?understanding how people communicate in Western business．Successful debaters learn how to give?their opinion,reasons and support．“What we are trying to do is to develop a kind of thinking or?approach to discussion and how to interact(交流)with someone else′s opinion,rather than brush?their opinion aside．”
Debate skills are also important in selling a product,he says．In that situation,the judges are the?customers．“So on Monday,for example,one company may come in and present their case to the?customer and they′ll?make as strong a case as they can．On Tuesday,the next day,another company?will come in and present their case to the customer．Usually the party that can present the strongest?case wins．”
Debate also strengthens critical thinking．In other words,it helps students learn to ask questions?and try to understand someone′s reasons and evidence．
Mr．Lebeau points out that successful debaters learn to listen carefully to what other people are?saying．Then,they look for the weak points in someone else′s opinion or argument．He says debate?teaches a systematic way of questioning．
Successful debaters also learn to think from someone else′s point of view．Mr．Lebeau saysdebate can help broaden the mind．“There′s an expression in English:don′t criticize another person?before you have walked in their shoes．I think the wonderful thing about debate is,it puts us in?another person′s shoes．”

What does the underlined word"case"in Paragraph 3 refer to?

A.Container．
B.Evidence．
C.Problem．
D.Product．

王某下班驾车回家途中被范某追尾，导致王某的汽车尾部受到了一定程度的毁坏。王某联系某修车行进行维修，修理完成后，王某前去提车时，修车行要求王某支付5000元的修理费。王某称：事故责任人是范某，该费用应由范某承担。修车行随即扣留了王某的车辆。对此，下列说法正确的是：( ）

A.基于合同的相对性，该费用应当由王某承担
B.修车行可以主张行使同时履行抗辩权扣留汽车
C.修车行可以主张行使留置权扣留汽车
D.该费用由王某承担，但修车行无权扣留汽车

在教育史上，存在着不同身份和地位的人享有不同的受教育机会和权利的现象。这说明学制具有（ ）

A.永恒性
B.继承性
C.阶级性
D.相对独立性