What emitted from the exhaust pipe of the GM minivan the author drove is so clean that it is drinkable. To separate hydrogen fr

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问题 What emitted from the exhaust pipe of the GM minivan the author drove is so clean that it is drinkable.
To separate hydrogen from oxygen needs electricity that can be created by ______.

选项

答案fossil fuels and coal

解析由题干关键词To separate hydrogen from oxygen need electricity定位到第三个小标题下第三段第二、三句。根据这两句可知从氧里分解氢需要用电，而发电又要用到矿物燃料。

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大学英语六级

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What emitted from the exhaust pipe of the GM minivan the author drove is so clean that it is drinkable. To separate hydrogen fr

大学英语六级

A—assemblylineJ—safetybootsB—packerK—shippingclerkC—forkliftL—timecardD—explosivematerialsM—warehouseE—fireext

Whenyoubuylifeinsurance,youwantapolicythatfitsyourneedsatareasonablecost.Yourfirststepistodeterminehowmu

A—WaitingandBoardingJ—CustomsDeclarationFormB—LuggageDeliveryK—QuantityAllowedtoTakeC—InspectionandQuarantineL

Americansdependontheircarsmorethananyotherpeople.Thefamilycarhasbeenacommonthingsincetheearly20thcenturya

Accordingtotheregulation,inspections______toensurethatthesystemsareingoodcondition.

Directions：Thispartistotestyourabilitytodopracticalwriting．YouarerequiredtowriteALetterofComplaintaccordingt

Thispartistotestyourabilitytodopracticalwriting.YouarerequiredtowriteanEmailaccordingtothefollowinginforma

It’shightimethegovernment______somemeasurestoraisepeople’sawarenessofenvironmentalprotection.

SalesofCDshavegreatlyincreasedsincetheearly1990s,whenpeople______toenjoytheadvantagesofthisnewtechnology.

A—fluorescentlampJ—microwaveovenB—electricfanK—smokeexhausterC—dictatingmachine

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在下列应设有应急照明的条件中，哪一条是错误的?

设备监理工程师的行为责任风险来源不包括( )。

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不考虑其他因素，甲公司发生的下列交易事项中，应当按照非货币性资产交换进行会计处理的有()。(2014年)

函数f(χ，y，z)＝χ2＋y2＋z2在点(1，－1，0)处沿球面χ2＋y2＋z2＝2在该点的外法线方向的方向导数＝_______。

设备监理工程师的行为责任风险来源不包括(　　)。