题目内容
（请给出正确答案）
Why do astronomers often use photographic plates？
A．To decrease the time it takes to photograph objects.
B．To avoid using a telescope.
C．To sharpen the color of what they observe.
D．To obtain images of distant objects.
安装简答题APP，拍照搜题省时又省心！
更多“Why do astronomers often use p…”相关的问题
Why do astronomers make long time exposures？
A．To spend less time at their telescopes.
B．To overcome the problem of weak light.
C．To take more photographs.
D．To photograph astronomical objects without using a telescope.
According to the passage, what do people often think about astronomers？
A．They spend most of their time looking through telescopes.
B．They are constantly analyzing data.
C．They often live near observatories.
D．They devote a lot of time to theoretical problems.
Why do people sometimes feel happy after the ants pass？
A．Because they can see no insects or snakes.
B．Because they eat their houses.
C．Because they eat their crops.
A．problem
B．mystery
C．question
D．point
听力原文：Do you know why the flight is delayed？
(A) It's delayed for two hours, until 8 o'clock.
(B) Yeah, it's due to mechanical problems.
(C) The flight goes to Houston, then Seattle.
(23)
A．
B．
C．
Does the writer think growing cities affect astronomers' work？ Why does he think so？
A．Yes. Because the once dark rural areas are polluted by lights.
B．No. Because they can still see stars in rural areas.
C．Yes. Because rural areas are not a good place for astronomers m study stars.
D．No. Because faint light given off by stars can still be seen on a clear night.
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
微信搜一搜
简答题
微信搜一搜
简答题
如搜索结果不匹配，请 
