According to the speaker, what do people often think about astronomers?

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问题 According to the speaker, what do people often think about astronomers?
  
Most people think of astronomers as people who spend their time in cold observatories peering through telescopes every night. In fact, a typical astronomer spends most of his/ her time analyzing data and may only be at the telescope a few weeks of the year. Some astronomers work on purely theoretical problems and never use a telescope at all. You might not know how rarely images are viewed directly through telescopes. The most common way to observe the skies is to photograph them.
Seventeenth-century houses in colonial North America were simple structures that were primarily functional, carrying over traditional designs that went back to the Middle Ages. During the first half of the eighteenth century, however, houses began to show a new elegance. As wealth increased, more and more colonists built fine houses.

选项 A、More architects arrived in the colonies.
B、The colonists developed an interest in classical architecture.
C、Bricks were more readily available.
D、The colonists had more money to spend on housing.

答案D

解析 掌握表因果关系的信号词,有助于迅速在原文定位信息点,并作出正确的因果关系判断,该文中使用了信号词as。
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