There is a lot of argument between people who believe in the truth of old weather rhymes (韵文) and people who are reluctant to be

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问题      There is a lot of argument between people who believe in the truth of old weather rhymes (韵文) and people who are reluctant to believe in them. The first group thinks the rhymes are helpful, but many others say that they are just silly devices that are more confusing than useful. For example, one rhyme says, "Red sky at morning, sailors take warning. Red sky at night, sailors “delight.” What would it mean? The disbelievers ask, if a red sky at night was followed by a moon with a ring around it? Are you supposed to discard one of the signs? Or perhaps you should dismiss both signs as an oddity of nature. Probably the best idea is to admit that it is an illusion that rhymes can predict the weather and go to bed.
     In spite of these problems, people who believe in weather sayings continue to take them seriously. Sometimes they are actually unhappy when the signs do not tell them what they want to hear. On February 2, if the groundhog comes out of its den, sees its shadow, and returns to the den, believers are saddened because there will be six more weeks of winter. However, if the groundhog happens to come out of its den on February 2 and stay out, the same people rejoice, for it is a sign of the arrival of spring, This is enough to make some believers bribe the groundhog to stay outdoors until February 3.
     However, there are some folk beliefs about the weather that really seem to work. Grandma’s aching joints have long served as a painful but fascinating way to foresee a change in the weather. Nevertheless, some scientists say there is nothing foolish about this belief. The pain that penetrates each joint is brought about by a change in air pressure, such as the change that pre- cedes a storm.
     Maybe some of these old superstitions have a basis in fact. In any case, it would not be ruinous to your health and you would not offend anyone if the next time you see a sign of storm danger, like birds roosting on a telephone line, you run for shelter. Even eminent scientists sometimes act superstitiously.
We learn from the passage that passage that a storm follows a change in ______.

选项 A、humidity
B、temperature
C、air pressure
D、moisture

答案C

解析
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