The passage gives a general description of both the advantages and disadvantages

游客2023-09-17  18

问题 The passage gives a general description of both the advantages and disadvantages brought by a hydrogen economy. [br] We must derive hydrogen from __________________ with a view to a pure hydrogen, economy.

选项

答案 renewable sources

解析 本题与氢的来源有关,从而将目标锁定在Where Does the Hydrogen Come From?下。该部分倒数第二段第二:句提到To have a pure hydrogen economy,the hydrogen must be derived from renewable sources…。with a view to 与 to have…都表示目的,原句用了被动语态,而题干转换成了主动语态。
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