問題詳情

請依下文回答第 46 題至第 50 題：The feeling that clouds and rain seem more likely to occur on weekends may be more than just a myth. Weekendweather does differ from weekday weather in certain places, according to researchers who studied more than 40 yearsof daily temperature readings from 10,000 weather stations worldwide. In their study, the researchers focused ontemperature differences between daytime highs and nighttime lows. This difference measurement is called the diurnaltemperature range, or DTR.Part of the study involved 660 weather stations in the continental United States. At more than 230 of these sites,the researchers found that the average DTR for Saturday, Sunday, and Monday was different from the average DTR forWednesday, Thursday, and Friday. Although the difference was small—only several tenths of a Celsius degree, thepattern was striking 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 thehuman activities—possibly air pollution caused by those activities—that are responsible for these weather effects. Forexample, tiny particles in the polluted air could effect the amount of cloud cover, which would in turn affect dailytemperatures. Accordingly, tiny windborne 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, stopfeeling like the weekend weather is out to get us. It simply has a lot do with which way the wind blows and where itcomes from.
46 According to the passage, which of the following is true about weekend weather?
(A)It has its own highs and lows.
(B)The nights are cooler on weekends.
(C)It gets warmer as the week progresses.
(D)The conditions remain the same all week long.

參考答案

答案：A
難度：適中0.462312
統計：A(92),B(41),C(34),D(24),E(0)

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