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当前学科：采矿工程师综合练习
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斜切分层与水平分层的区别是什么？
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当船舶由较高载重线海区航行至较低载重线海区时，且高载重线段所消耗的油水总量大于高低载重线所对应的排水量之差，则船舶的排水量应根据（）确定。
国家教育部决定，已将中小学体育课改名为什么课？
哪一种牙轮钻头牙齿更适合钻硬地层（）。
根据下列短文，回答题。 A panel of government officials is worried．The air quality in some areas is not good．Theair is polluted with soot．The officials worry that the air is harmful to the people who breathethe air．The officials are expels．They study the environment．They diSCUSS ways to stop theair pollution．The panel decided to make，some changes to the law． The mew plan places strict limits on how much soot call be released into the air．Now，ameasurement of 65 parts of soot is considered safe．The new plan would reduce that number to30．The daily limit of pollution in the air would be cut in half． These new standards would affect industry．The limits would also affect people who ownwood stoves and fireplaces．The country will keep track of the air quality every day．Peoplewould be required to stop burning wood when the levels are high．They could also install a kindof special fireplace．These fireplaces burn very little wood．They do not pollute the air asmuch．Some countries will punish families who violate the ban．They will have to pay a fine fornot complying with the law． Some states do not have much industry．Their pollution problem is not too bad．Theywould stiU have to regulate how much pollution is released into the air．The experts hope thatthis ban will help keep the air cleaner．Before the plan becomes a law the public will have a chance to comment on it．Citizenswill have ninety days to ask questions and voice concerns about the plan．Then it will becomea law．The panel is made up of________．
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在竞争性经济环境中，成本管理系统的总体目标主要依据竞争战略而定，则下列说法中正确的是（）。
期货交易的持仓量增加，表明（）。
上消化道造影硫酸钡造影剂的浓度（）。
继电保护装置将包括测量部分（和定值调整部分）、逻辑部分和（）.