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

游客2024-09-26 38

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

Whatdoastronomersusephotographicplatefor?A、Decreasingthetimeittakesto

Accordingtothepassage,whatdopeopleoftenthinkaboutastronomers?[origina

Whatmightbethepossiblereasonforusinganoldmethodtoconstructthebuildi

WhichofthefollowingisNOTthereasonforwildanimalsgettingendangered?A、C

Whatisthemainreasonthatpeoplethereliketheswallows?A、Theswallowsareh

WhichofthefollowingstatementsisCORRECT?A、Themanthinkshecanreasonwith

WhatisMr.Johnson’smainreasonforfindinganewjob?[originaltext]W:Hello,M

ThewomanlovetoliveinthecityforthefollowingreasonsEXCEPTthat[origin

Thereisnoconceivablereasonwhythereshouldbeanydifficultyduringthepro

Inaninventivemind,imaginationoftenservesasanecessary______toreason.A

Ithinkit______hightimethey______totakeyoumoreseriously.A、was,began

Manyoftheemployeesthinktheircareerpathbeginsduringtheiremployment

Whatamarvelousmealyouhavegivenus--areal______.A、feastB、celebrationC、

A. B. C. D.

某住宅楼由市政管网供水，服务压力为0.2MPa时，可供水至()。A.3层楼

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Inimplementationofteaching,toarouse

下列选项中，符合所给一组图形的变化规律的是（）。

工程网络计划的资源优化是指通过改变（ ），使资源按照时间的分布符合优化目标。

急性胰腺炎时血清淀粉酶升高的规律为A.发病后2小时升高，12小时达到高峰 B.

Ithinkithightimetheytotakeyoumoreseriously.A、was,began

工程网络计划的资源优化是指通过改变（　），使资源按照时间的分布符合优化目标。