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).
Because of the vacuum,the boiling point of the liquid is lower thaa it would be under_____ (59)atmospheric pressure.This effect is known from the mountains:as the atmospheric pressure there is lower than in the valley,water boils at temperatures distinctly below 100~C.The evaporated, non-saline water is condensed and runs down through a completely filled tube in a controlled manner.The gravity of this water column_________(60)produces the vacuum and so a vacuum pump is not needed.The reconcentrated brine________(61)down the tower surface again to absorb moisture from the air.
"The concept is suitable for various water_________(62).Single-person units and plants supplying water to entire hotels are conceivable,"says Egner.Prototypes have been built for______
(63)system components-air moisture absorption and vacuum evaporation-and the research scientistshave Mready________(64)their interplay on a laboratory scale.In a further________(65)the researchers intend to develop a demonstration facility.
51.A.road B.channel C.way D.path
52.A.in spite of B.because of C.as a result of D.such as
53.A.who B.where C.when D.which
54.A.meanwhile B.therefore C.however D.still
55.A.prospect B.process C.progress D.product
56.A.from B.at C.above D.into
57.A.keeps B.brings C.breaks D.heats
58.A.attracted B.affected C.allowed D.absorbed
59.A.normal B.different C.easy D.available
60.A.continuously B.suddenly C.typically D.seriously
61.A.takes B.puts C.flies D.runs
62.A.users B.designers C.owner D.workers
63.A.both B.every C.same D.either
64.A.repaired B.cancelled C.tested D.copied
65.A.instrument B.step C.case D.ground
51.c [解析]way方法;A.road;B.chennel;D.path。根据上下文可知"科研人员发现了一种可以从空气中水分获取饮用水的方法。"所以选C。
2017年职称英语综合类B级完形填空提升练习题三.doc正在阅读:
致冰花男孩的一封信400字08-23
2020广东广州大学第三次招聘事业编制人员公告【23人】10-16
2023年河南省新乡长垣市招才引智公开招聘2023届高校毕业生156名公告06-14
越过心中的那道坎作文800字01-10
父母必读的大班教育笔记大全【三篇】06-27
星海音乐学院2017高考录取通知书查询01-23
添加一抹绿作文800字08-08
2021山东省中医药研究院附属医院招聘简章【6人】10-16
经典少儿诗歌朗诵精选大全11-11