猜你想看
[单选题] It is absurdto predict that the sun will not rise tomorrow（）
[单选题] He will consolidate his power.
[单选题] The original experiment cannot be exactly duplicated.
[单选题] At 80,Peck was still vigorous and living in Paris.
[单选题] The letter without the address puzzled me.
[单选题] We often take a stroll in the park after dinner for about an hour.
[单选题] France has kept intimate inks with its former African territories.
[单选题] 共用题干
Obtaining Drinking Water from Air Humidity<br><br>Not a plant to be seen,the desert ground is too dry.But the air contains water,and research scientists<br>have found a. __________<br>(51)of obtaining drinking water from air humidity."The process we have <br>developed is based exclusively on renewable energy sources_________(52)thermal solar collectors and<br>photovoltaic（光电的）cells , ________( 53 ) makes this method completely energy-autonomous. It will <br>____________( 54 ) function in regions where there is no electrical infrastructure（基础设施）,"says Siegfried <br>Egner,head of the research team. The principle of the_________(55)is as follows:hygroscopic（吸湿的） <br>brine（盐水）一saline（含盐的）solution which absorbs moisture一runs down a tower-shaped unit and absorbs <br>water from the air. It is then sucked__________(56)a tank a few meters off the ground in which a vacuum <br>prevails.Energy from solar collectors_________(57)up the brine,which is diluted by the water it has<br>__________ (58).<br>Because of the vacuum,the boiling point of the liquid is lower than it would be under__________(59) <br>atmospheric pressure. The evaporated (蒸发的）, non-saline water is condensed and runs down through a <br>completely filled tube in a controlled manner. The gravity of this water column_______(60)produces the <br>vacuum and so a vacuum pump is not needed.The reconcentrated brine________(61)down the tower <br>surface again to absorb moisture from the air.<br>"The concept is suitable for various water________(62).Single一person units and plants<br>supplying water to entire hotels are conceivable,"says Egner. Prototypes have been built for_______<br>(63)system components一air moisture absorption and vacuum evaporation一and the research scientists<br>have already __________(64)their interplay on a laboratory scale.In a further ________(65)the re- <br>searchers intend to develop a demonstration facility.
[单选题] China will prohibit smoking in all offices later this year.
[单选题] France has kept intimate bond with its former African territories.
