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  3. 共用题干 Obtaining Drinking Water from Air HumidityNot a plant to be seen,the de...

共用题干 Obtaining Drinking Water from Air HumidityNot a plant to be seen,the de...

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问题 共用题干
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 process we have
developed is based exclusively on renewable energy sources_________(52)thermal solar collectors and
photovoltaic（光电的）cells , ________( 53 ) makes this method completely energy-autonomous. It will
____________( 54 ) function in regions where there is no electrical infrastructure（基础设施）,"says Siegfried
Egner,head of the research team. The principle of the_________(55)is as follows:hygroscopic（吸湿的）
brine（盐水）一saline（含盐的）solution which absorbs moisture一runs down a tower-shaped unit 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,which is diluted by the water it has
__________ (58).
Because of the vacuum,the boiling point of the liquid is lower than it would be under__________(59)
atmospheric pressure. The evaporated (蒸发的）, 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一person units and plants
supplying water to entire hotels are conceivable,"says Egner. Prototypes have been built for_______
(63)system components一air moisture absorption and vacuum evaporation一and the research scientists
have already __________(64)their interplay on a laboratory scale.In a further ________(65)the re-
searchers intend to develop a demonstration facility.
选项 _________(65)
A:instrument
B:step
C:case
D:ground
答案B
解析根据上下文可知“科研人员发现了一种从空气里的水分中获取饮用水的方法”，所以 选C。
such as表示“比如”，用于列举。
此处为非限制性定词从句，所以用which。
根据上文“这使得该方法在能量方面完全自主”可知，这里指“即使在没有电力基础设 施的地方仍可起到作用”，所以选D。
根据上下文可知“这套工序的原理如下”，所以选B。
suck into表示“吸入”。
根据上下文可知这里指“来自太阳能收集器的能量将盐水加热”。
absorb表示“吸收”，这里指稀释所吸收的水。
normal“正常的”，这里指“在真空环境中，液体的沸点要比在正常大气压下低。”
continuously“不间断地”;suddenly“突然地”;typically“典型地”;senously“严重地”。根据上下文可知，这里指“水柱的重力持续制造真空状态，所以不需要真空泵”。
run原意为“跑”，但这里是“流动”的意思，run down“沿着······流动”。根据上下文可知“二次浓缩的盐水会沿着塔状物再次向下流去吸收空气中的水”，所以选D。
根据上下文可知“这一理念适用于各种各样的水的使用者”，所以选A。
both"（两者）都”；因为这里是强调空气水汽吸收器和真空蒸汽机两个机器之间的作用 效果，所以选A。
这里指“科研人员已经在实验室里测试了它们相互作用的效果”，所以选C。
step“步骤”;instrument“工具”;case“案例”;ground“地面”。根据上下文可知“在下一步 的研究中，研究者会开发出一套用于展示的设备”，所以选B。
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