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导语：以下英语网为大家整理了全面的职称英语考试历年真题及答案解析，《职称英语考试试题汇总：历年真题及答案解析》供大家参考学习。更多职称英语考试试题敬请关注英语网！ 【推荐】关注英语网微信：yingyuwang2013，更快获取真题答案及成绩查询信息。 第6部分：完形填空(第51～65题，每题1分，共15分) 下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 Obtaining Drinking Water from Air Humidity Not a plant to be seen，the desert ground is too dry．But the air contains water，and research scientists have found a_________(51)of obtaining drinking water from air humidity．The system isbased completely on renewable energy and is therefore autonomous． Cracks permeate the dried-out desert ground and the landscape bears testimony to the lack of water．But even here，where there are no lakes，rivers or groundwater，considerable quantities of water are stored in the air．In the Negev desert in Israel，for example，annual average relative air hu-midity is 64 percent-in every cubic meter of air there aye 11．5 milliliters of water． German research scientists have found a way of converting this air humidity autonomously intodrinkable water．The process we have developed is based exclusively on renewable energy sources_______(52)thermal solar collectors and photovoltaic ceils，_________(53)makes this methodcompletely energy-autonomous．It will_______(54)function in regions where there is no electricalinfrastructure．says Siegfried Egner，head of the research team．The principle of the_______ (55)is as follows：hygroscopic brine-saline solution which absorbs moistureruns down a tower-shapedunit and absorbs water from the air．It is then sucked_________(56)a tank a few meters off the ground in which a vacuum prevails．Energy from solar collectors_________(57)up the brine，whichis diluted by the water it has________(58). | 
