Classical Cepheids are the brighter/more luminous of the two classes. These stars tend to be Population I stars. These are metal-rich stars, meaning they contain elements other than hydrogen and helium. They contain other metals as well. A Population I star can contain anything from 0.1 to ...
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We are not, in our words, thoughts and non verbs and attractive. Are stressed while focusing world like articles. Report says the conservatives are usually unstressed. Listen to the following sentences carefully and underline the words that are stressed. You're welcome. Rome was not built in a...
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26、use.Entertain friends or family at home.Because all her friends have a doll like that.Because the dolls dress matches hers very well.Because the dolls she has got before are all too old.Because the doll makes a good gift for its high price.2.Give her a doll worth remembering.Take ...
NewcastleuponTyneinnortheastEnglandareboth currentlyconsideringbecomingNationalParkCities. 8.WhatmakesLondon morelikelytobecomeanationalparkcitythanothercities? A.Itssmallerpopulation. B.Itslessdenseurbanization. C.Itscitizens?greatsupport. D.Thegovernment?sefforts. 9.WherecanwefindthedataonLondon?smeasures to...
A spectral atlas of post-main-sequence stars in omega Centauri: kinematics, evolution, enrichment and interstellar medium We present a spectral atlas of the post-main-sequence population of the most massive Galactic globular cluster, Centauri. Spectra were obtained of more th... JTV Loon,FV Leeuw...
So could it be that Earth really is unique? All living things on Earth are made of the same building blocks, long carbon-based molecules.所以地球真的是独一无二的吗？地球上所有的生物都有着相同的组成成分，即长碳基分子。Scientists now think that a large proportion of these molecules came from...
The bodies of these women are used to sell and attract (predominantly heterosexual male) attention. Female celebrities pose provocatively on the covers of magazines, male stars (usually fully dressed) pose alongside minimally-dressed models or simply on their own. The message is that men are provo...