What is the one reason astronomers make long time exposures?A、To spend less time

游客2023-11-05 7

问题 What is the one reason astronomers make long time exposures?

选项 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.

答案 B

解析细节题。文章后面讲到由于大部分天体距离很远，所以我们能捕捉到的它们所发出的光线也很微弱，但如果用望远镜充当照相机就可以进行长时间曝光，以此将物体拍下来。故B项正确。

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What is the one reason astronomers make long time exposures?A、To spend less time

Youallknowthereasonswhichhaveimpelledmeto______thethrone.A、renderB、

ThereasonBeethovenwentawaytothecountryis______.A、thathewasgradually

Whatisthepossibi9reasonforthecandidatesfailtogetjobsattheBBC?[br]

Whatisthepossibi9reasonforthecandidatesfailtogetjobsattheBBC?[ori

Yourreasonsfordemandinganincreaseinwagesare______.A、inaccurateB、inadeq

ThereasonwhyIleftbeforethemeetingendedwas________________Iwasbored

Whichofthefollowingismentionedasareasonforthelowpopulationgrowthra

Whichofthefollowingismentionedasareasonforthelowpopulationgrowthra

ThewomanlovetoliveinthecityforthefollowingreasonsEXCEPTthat[br][

ThewomanlovetoliveinthecityforthefollowingreasonsEXCEPTthat[origin

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Newspapersandtelevisionoftenpresentthebadsideoflifetons.Lifeis,

Theearliestprocessofmakingpaperwasdonealmost5,000yearsagoinEgyp

教师的职业生活中所有的人际关系都需要用到的原则是（）。A.公正 B.仁慈

《女神》最重要的艺术特色是（）A.象征色彩 B.浪漫主义特色 C.清新婉丽

孕妇，26岁，患风湿性心脏病，心功能Ⅱ级，现足月临产，宫口已开全，较疲劳，下述哪

治疗阴气偏亢的虚寒证，应采用的治则是A.寒者热之 B.热者寒之 C.阳病治阴

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