分析 這篇短文主要給我們介紹了一些關(guān)于星球的天文知識. 宇宙當(dāng)中的行星.其中星星不只有我們看到的白色,還有紅色和藍(lán)色,這些都是死去的星星.星星考?xì)怏w燃燒發(fā)光,當(dāng)氣體用盡,星星便會死去.而太陽被證實不會死去.
解答 74.D 細(xì)節(jié)理解題.As a star's gases burn,they give off light and heat.But when the gas runs out,the star stops burning and begins to die.可見當(dāng)氣體用完時,恒星停止燃燒并開始死亡.所以答案選D.
75.B 細(xì)節(jié)理解題.根據(jù)句子That's how tightly this dead star,a black hole,is packed,可見黑洞是死星A選項正確;The light from a black hole can never come back to your eyes.That's why you see nothing but blackness.可見黑洞是看不見的所以C選項正確;A black hole is so tightly packed that its gravity sucks in everything-even light.可見黑洞是有萬有引力的,所以D選項正確.但是B選項的內(nèi)容文中沒有提到,所以答案選B.
76.A 細(xì)節(jié)理解題.根據(jù)句子If the star was very small,the star ends up as a cold,dark ball called a black dwarf.可見black dwarf是小的,黑的而且是冷的,所以A選項的說法是錯誤的,故答案選A.
77.D 細(xì)節(jié)理解題.根據(jù)句子A black hole is so tightly packed that its gravity sucks in everything-even light.The light from a black hole can never come back to your eyes.黑洞是如此緊密地包裹著,以至于它的引力會被所有的東西所吸收,即使是光,黑洞里的光也不會再回到你的眼睛里.可見黑洞的引力很強(qiáng),它會把光線吸進(jìn)去.所以答案選D.
點評 本文淺顯易懂,各個小題都能在文中找到適當(dāng)依據(jù).只要認(rèn)真閱讀短文,注意前后聯(lián)系,就能順利完成閱讀.文章所設(shè)試題主要考察細(xì)節(jié)查找,做題關(guān)鍵是找出原文的根據(jù),認(rèn)真核查小題和原文的異同.
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