【单选题】听力原文: In the future, water problems will become more and more serious. Our increasing population will greatly increase urban wastes. On the other hand, people's increasing demand for water will decrea...
A.
Serious water pollution in the future.
B.
People's increasing demand for water.
C.
Agriculture and its relation with water pollution.
【简答题】A liquid can be converted to a supercritical fluidby increasing (T) (and consequently its vapor pressure) and simultaneously increasing pressure (p).
【简答题】What do we learn from the last paragraph? A) If we focus our attention on one thing, we might forget another. B) Memory depends to a certain extent on the environment. C) Repetition helps improve our ...