The concept is suitable for various water 12 Single-person units and plants 13 water to entire hotels are conceivable, says Egner. Prototypes have been built for both system components-air moisture absorption and vacuum evaporation-and the research scientists have already 14 their interplay on a laboratory scale. In a further step the researchers in-tend to develop a demonstration 15 .
练习:
1. A dry
B dirty
C sandy
D clean
2. A path
B way
C channel
D road
3. A oil
B wood
C coal
D solar
4. A when
B what
C where
D who
5. A promise
B progress
C prospect
D process
6. A of
B with
C off
D below
7. A absorbed
B attracted
C allowed
D affected
8. A wetter
B hotter
C lighter
D lower
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