题目

It’s hardly surprising that weather is a favorite topic for so many people around the world---it affects where we choose to live, what we wear, our moods, and perhaps even our national characteristics．Studies have shown that changeable weather can make it difficult to concentrate, cloudy skies slow down reaction, and high humidity with hot, dry winds makes many people bad-tempered． If you live in a place like Britain, where the weather seems to change daily if not hourly, you could be forgiven for thinking that the weather is random．In fact, the weather is controlled by systems which m