Which of the following does NOT fit the definition of the black hole? We learn from this passage that

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问题 Which of the following does NOT fit the definition of the black hole?
We learn from this passage that

选项 A、the sun is the heaviest star in the universe.
B、a star in the sky might have an invisible partner.
C、two black holes are dragged towards each other.
D、the mass of a star is equal to that of its companion.

答案B

解析

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本试题收录于：职称英语理工类B级题库职称英语分类

职称英语理工类B级

职称英语

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【B1】【B10】

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Which of the following does NOT fit the definition of the black hole? We learn from this passage that

职称英语理工类B级

职称英语

A.putforwardtheideaoffoundingtheOpenUniversityB.thanitcouldadmitC.learnthroughcorrespondenceD.offerfoundati

TooPoliteforWordsAJapanesecolleaguetheotherdaywastalkingaboutameetingwithamanwhomsheabruptlydescribedu

TheIcemanOnaSeptemberdayin1991,twoGermanswereclimbingthemountainsbetweenAustriaandItaly.Highuponamount

ABiologicalClockEverylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalcloc

EveryDogHasItsSayKimikoFukuda,aJapanesegirl,alwayswonderedwhatherdogwastryingtosay.Wheneversheputonma

StomachUlcerStomachulcersarethecauseofseverepainformanypeople.Doctorshavebeenabletohelplessenthepainof

EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei

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It’sprudenttotakeathickcoatincoldweatherwhenyougoout.

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女性，45岁，左乳腺外上象限肿物直径2cm，质硬，不活动，无压痛，腋下可触及一枚0．8cm淋巴结，最可能诊断是

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民用建筑工程及室内装修工程的室内环境质量验收，应在工程完工至少()天以后、工程交付使用前进行。

设等差数列{an}的前n项和为Sn，若a1=-5，且它的前11项的平均值是5。求等差数列的公差d；

设=___________．

在图4-9所示的计算机系统中，R1、R2、R3分别为3种不同的加工部件，但每个加工部件的失效率均为λ，可靠性均为R，则该系统的可靠性为(1)。若每个加工部件的平均无故障时间为5000小时，则该系统的平均无故障时间为(2)小时。(1)

【B1】【B10】