47 How did the researchers conduct their research?
(A)Visiting weather stations around the world.
(B)Gathering weather forecasts from TV stations.
(C)Studying the weather data recorded around the world.
(D)Collecting the myths passed down through generations.

文章第4行，according to researchers who studied more than 40 years of daily temperature readings from 10,000 weather stations worldwide. 就可以知道，研究員研究全世界的天氣資料!

The feeling that clouds and rain seem more likely to occur on weekends may be more than just a myth神話.

Weekend weather does differ from weekday工作日 weather in certain places, according to researchers who studied more than 40 years of daily temperature readings from 10,000 weather stations worldwide. 

In their study, the researchers focused on temperature differences between daytime highs and nighttime lows. 

This difference measurement is called the diurnal白天發生的 temperature range, or DTR. 

Part of the study involved涉及 660 weather stations in the continental大陸  United States. 

At more than 230 of these sites, the researchers found that the average平均 DTR for Saturday, Sunday, and Monday was different from the average DTR for Wednesday, Thursday, and Friday. 

Although the difference was small—only several tenths十分之一 of a Celsius攝氏溫度 degree, the pattern was striking引人注目 enough to make the scientists take notice. 

That is, the DTR changes on a 7-day cycle. 

This sort of weekly rise and fall doesn’t line up with any natural cycles, the researchers say. 

Instead, it is the human activities—possibly air pollution caused by those activities—that are responsible for these weather effects. 

For example, tiny particles in the polluted air could effect the amount量 of cloud cover, which would in turn affect daily temperatures. 

Accordingly相應地, tiny wind borne（bear 的過去分詞）傳播、攜帶 particles from the western part of the United States, generated on weekdays, might first affect weather close to home in the southwest, and then later influence mid-western weather. 

So, stop feeling like the weekend weather is out to get us. 

It simply has a lot do with which way the wind blows and where it comes from.