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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{{U}}
(51) {{/U}}of obtaining drinking water from air humidity．
“The process we have developed is based exclusively on renewable energy
sources{{U}} (52) {{/U}}thermal solar collectors and
photovoltaic(光电的)cells，{{U}} (53) {{/U}}makes this method completely
energy autonomous．It will{{U}} (54) {{/U}}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{{U}} (55) {{/U}}is as
follows：hygroscopic(吸湿的)brine(盐水)，-saline(含盐的)solution which absorbs
moisture-runs down a tower shaped unit and absorbs water from the air
A. instrument
B. step
C. case
D. ground
更多"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。
"的相关试题:
[单项选择] 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。
{{B}}Staying Active
in Old Age Keeps People Mobile{{/B}}
People over 70 who aren’t
active are more likely to develop problems walking or climbing stairs within a
few years, according to a new study.
These findings suggest that
it’s very important to stay______(51) in old age, study author Dr. Marjolein
Visser told Reuters Health.
"Physical activity in old age is as
important______(52) taking your medications (药物)," Visser noted. "You do not
need to join an expensive, fancy sports club with high-tech (高科技的) equipment.
Your body will already______(53) from regular walking."
Visser,
a Dutch (荷兰的) scholar, explained that______(54) active helps prevent people from
becoming breathless during simple activities, increase muscle mass and strength,
and maintain the
A. from
B. into
C. on
D. of
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