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Infrared Galaxies in the Nearby Universe

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Ｃｈｉｎ．Ｊ．Ａｓｔｒｏｎ．Ａｓｔｒｏｐｈｙｓ．Ｖｏ１．８（２００８），Ｎｏ．６，６４３－６５２　

（ｈｔｔｐ：／／ｗｗｗ．ｃｈｊａａ．ｏｒｇ）　

Ｉｎｆｒａｒｅｄ　Ｇａｌａｘｉｅｓ　ｉｎ　ｔｈｅ　Ｎｅａｒｂｙ　Ｕｎｉｖｅｒｓｅ　

Ｊｉａｎ—Ｌｉｎｇ　Ｗａｎｇ　ｃｈｉｎｅｓｅ　Ｊｏｕｒｎａｌ　ｏｆ　Ａｓｔｒｏｎｏｍｙ　ａｎｄ　Ａｓｔｒｏｐｈｙｓｉｃｓ　

Ｎａｔｉｏｎａｌ　Ａｓｔｒｏｎｏｍｉｃａｌ　Ｏｂｓｅｒｖａｔｏｒｉｅｓ，Ｃｈｉｎｅｓｅ　Ａｃａｄｅｍｙ　ｏｆ　Ｓｃｉｅｎｃｅｓ，Ｂｅｉｊｉｎｇ　１　０００　１　２，Ｃｈｉｎａ；　

ｗｊｉａｎｌ＠ｂａｏ．ａｃ．ｃｎ　Ｇｒａｄｕａｔｅ　Ｓｃｈｏｏｌ　ｏｆ　Ｃｈｉｎｅｓｅ　Ａｃａｄｅｍｙ　ｏｆ　Ｓｃｉｅｎｃｅｓ，Ｂｅｉｊｉｎｇ　１０００４９，Ｃｈｉｎａ　

Ｒｅｃｅｉｖｅｄ　２００７　Ａｐｒｉｌ　２４；ａｃｃｅｐｔｅｄ　２００８　Ａｕｇｕｓｔ　２８　

Ａｂｓｔｒａｃｔ　Ｗｌｅ　ｕｓｅｄ　ｔｈｅ　Ｓｌｏａｎ　Ｄｉｇｉｔａｌ　Ｓｋｙ　Ｓｕｒｖｅｙ　ｆＳＤＳＳ）Ｄａｔａ　Ｒｅｌｅａｓｅ　５（ＤＲ５）ｔｏ　ｓｔｕｄｙ　ｔｈｅ　ｍｏｒｐｈｏｌｏｇｉｃａｌ　ｐｒｏｐｅｒｔｉｅｓ　ｏｆ　１１　３７　ｎｅａｒｂｙ　ｉｎｆｒａｒｅｄ　ｆＩＲ）ｇａｌａｘｉｅｓ，ｍｏｓｔ　ｏｆ　ｗｈｉｃｈ　ａｒｅ　ｂｒｉｇｈｔｅｒ　

ｔｈａｎ　１５．９　ｍａｇ　ｉｎ　ｒ—ｂａｎｄ．Ｔｈｉｓ　ｓａｍｐｌｅ　ｗａｓ　ｄｒａｗｎ　ｆｒｏｍ　ａ　ｃｒｏｓｓ—ｃｏｒｒｅｌａｔｉｏｎ　ｏｆ　ｔｈｅ　Ｉｎｆｒａ—Ｒｅｄ　

Ａｓｔｒｏｎｏｍｉｃａｌ　Ｓａｔｅｌｌｉｔｅ（ＩＲＡＳ）ｐｏｉｎｔ　ｓｏｕｒｃｅ　ｃａｔａｌｏｇ　ｒｅｄｓｈｉｆｔ　ｓｕｒｖｅｙ　ｗｉｔｈ　ＤＲ５　ａｔ　０．０８．　

Ｂａｓｅｄ　ｏｎ　ｔｈｉｓ　ＩＲ　ｇａｌａｘｙ　ｓａｍｐｌｅ．ｗｅ　ｃｏｎｓｔｒｕｃｔｅｄ　ｆｉｖｅ　ｖｏｌｕｍｅ—ｌｉｍｉｔｅｄ　ｓｕｂ—ｓａｍｐｌｅｓ　ｗｉｔｈ　ＩＲ　ｌｕｍｉｎｏｓｉｔｙ　ｒａｎｇｉｎｇ　ｆｒｏｍ　１０９．５Ｌｒ＝、ｔｏ　１０１２　．Ｂｙ　ｄｅｒｉｖｉｎｇ　ｔｈｅ　ＩＲ　ｌｕｍｉｎｏｓｉｔｙ　ｆｕｎｃｔｉｏｎｓ（ＬＦ）　ｆｏｒ　ｄｉｆｆｅｒｅｎｔ　ｍｏｒｐｈｏｌｏｇｉｃａｌ　ｔｙｐｅｓ，ｗｅ　ｆｏｕｎｄ　ｔｈａｔ　ｎｏｒｍａｌ　ｓｐｉｒａｌ　ｇａｌａｘｉｅｓ　ａｒｅ　ｔｈｅ　ｄｏｍｉｎａｎｔ　ｐｏｐｕｌａｔｉｏｎ　ｂｅｌｏｗ　ＴＲ一８×１０ｌＯ　Ｌ　：ｗｈｉｌｅ　ｔｈｅ　ｆｒａｃｔｉｏｎ　ｏｆ　ｂａｒｒｅｄ　ｓｐｉｒａｌ　ｇａｌａｘｉｅｓ　ｉｎｃｒｅａｓｅｓ　

ｗｉｔｈ　ｉｎｃｒｅａｓｉｎｇ　ＩＲ　１ｕｍｉｎｏｓｉｔｙ　ａｎｄ　ｂｅｃｏｍｅｓ　ｄｏｍｉｎａｎｔ　ｉｎ　ｓｐｉｒａｌ　ｇａｌａｘｉｅｓ　ｂｅｙｏｎｄ　ＬＩＲ　５×　

１０　，＝、．Ａｓ　ｔｈｅ　ＩＲ　１ｕｍｉｎｏｓｉｔｙ　ｄｅｃｒｅａｓｅｓ，ｔｈｅ　ＩＲ　ｇａｌａｘｉｅｓ　ｂｅｃｏｍｅ　ｍｏｒｅ　ｃｏｍｐａｃｔ　ａｎｄ　ｈａｖｅ　ｌｏｗｅｒ　ｓｔｅｌｌａｒ　ｍａｓｓｅｓ．Ｔｈｅ　ａｎａｌｙｓｉｓ　ａｌｓｏ　ｓｈｏｗｓ　ｔｈａｔ　ｎｏｒｍａｌ　ｓｐｉｒａｌ　ｇａｌａｘｉｅｓ　ｇｉｖｅ　ｔｈｅ　ｄｏｍｉｎａｎｔ　

ｃｏｎｔｒｉｂｕｔｉｏｎ　ｔｏ　ｔｈｅ　ｔｏｔａｌ　ｃｏｍｏｖｉｎｇ　ＩＲ　ｅｎｅｒｇＹ　ｄｅｎｓｉｔｙ　ｉｎ　ｔｈｅ　ｎｅａｒｂｙ　ｕｎｉｖｅｒｓｅ，ｗｈｉｌｅ，ｉｎ　ｃｏｎｔｒａｓｔ，　

ｔｈｅ　ｃｏｎｔｒｉｂｕｔｉｏｎ　ｆｒｏｍ　ｐｅｃｕｌｉａｒ　ｇａｌａｘｉｅｓ　ｉｓ　ｏｎｌｙ　３９％．　

Ｋｅｙ　ｗｏｒｄｓ：ｇａｌａｘｉｅｓ：ｅｖｏｌｕｔｉｏｎ－－——ｇａｌａｘｉｅｓ：ｉｎｔｅｒａｃｔｉｏｎｓ－－——ｇａｌａｘｉｅｓ：ｓｔａｒｂｕｒｓｔ—－——ｉｎｆｒａｒｅｄ　

ｇａｌａｘｉｅｓ・－－——ｇａｌａｘｉｅｓ：ｌｕｍｉｎｏｓｉｔｙ　ｆｕｎｃｔｉｏｎ　

１　ＩＮＴＲｏＤＵＣＴＩｏＮ　

Ｕｎｄｅｒｓｔａｎｄｉｎｇ　ｈｏｗ，ｗｈｅｎ　ａｎｄ　ｗｈｅｒｅ　ｍｏｓｔ　ｓｔｅｌｌａｒ　ｍａｓｓ　ｉｓ　ｐｒｏｄｕｃｅｄ　ｉｓ　ａｎ　ｉｍｐｏｒｔａｎｔ，ｕｎｓｏｌｖｅｄ　ｐｒｏｂｌｅｍ．Ｉｎ　ｔｈｅ　

ｌａｓｔ　ｄｅｃａｄｅ．ｔｈｅｒｅ　ｈａｖｅ　ｂｅｅｎ　ｎｕｍｅｒｏｕｓ　ｓｔｕｄｉｅｓ　ｏｆ　ｓｔａｒ　ｆｏｒｍａｔｉｏｎ　ｈｉｓｔｏｒｙ　ａｓ　ａ　ｆｕｎｃｔｉｏｎ　ｏｆ　ｒｅｄｓｈｉｆｌ（ｅ．ｇ．Ｌｉｌｌｙ　

ｅｔ　ａ１．１９９６；Ｍａｄａｕ　ｅｔ　ａ１．１９９８）．Ｉｔ　ｈａｓ　ｂｅｅｎ　ｃｏｎｆｉｒｍｅｄ　ｂｙ　Ｓｐｉｔｚｅｒ　ｏｂｓｅｒｖａｔｉｏｎｓ　ｔｈａｔ　ｔｈｅ　ｓｔａｒ　ｆｏｒｍａｔｉｏｎ　ｒａｔｅ　

ｄｅｎｓｉｔｙ　ｈａｓ　ｒａｐｉｄｌｙ　ｄｅｃｌｉｎｅｄ　ｂｙ　ａ　ｆａｃｔｏｒ　ｏｆ＾一１０　ｓｉｎｃｅ　ｒｅｄｓｈｉｆｔ一１（Ｌｅ　Ｆ１ｏｃ’ｈ　ｅｔ　ａ１．２００５）．Ｔｏ　ｕｎｄｅｒｓｔａｎｄ　ｔｈｅ　

ｓｔａｒ　ｆｏｒｍａｔｉｏｎ　ｐｒｏｃｅｓｓ　ａｔ　ｈｉｇｈ．ｒｅｄｓｈｉｆｔ．ｉｔ　ｉｓ　ａ　ｐｒｅｒｅｑｕｉｓｉｔｅ　ｔｏ　ｕｎｄｅｒｓｔａｎｄ　ｔｈｅ　ｐｒｏｐｅｒｔｉｅｓ　ｏｆ　ｌｏｃａｌ　ｓｔａｒ－ｆｏｒｍｉｎｇ　

ｇａｌａｘｉｅｓ．　Ｔｈｅ　Ｓ（Ｉｎｆｒａ．Ｒｅｄ　Ａｓｔｒｏｎｏｍｉｃａｌ　Ｓａｔｅｌｌｉｔｅ１　ｄａｔａｂａｓｅ　ｓｔｉｌｌ　ｐｌａｙｓ　ａｎ　ｉｍｐｏｒｔａｎｔ　ｒｏｌｅ　ｗｉｔｈ　ｄａｔａ　ｙｅｔ　ｔｏ　ｂｅ　

ｅｘｐｌｏｒｅｄ　ｆＬｏｎｓｄａｌｅ　ｅｔ　ａ１．２００６；Ｗｕ　ｅｔ　ａ１．１９９８ａ＇ｂ：Ｇｏｔｏ　２００５；Ｐａｓｑｕａｌｉ　ｅｔ　ａ１．２００５；Ｃａｏ　ｅｔ　ａ１．２００６；Ｗａｎｇ　

ｅｔ　ａ１．２００６）．Ｔｈｉｓ　ａｌｌ—ｓｋｙ　ｓｕｒｖｅｙ　ｃｏｎｄｕｃｔｅｄ　ｂｙ　Ｓ　ｐｒｏｄｕｃｅｄ　ｔｗｏ　ｃａｔａｌｏｇｓ：ｔｈｅ　Ｆａｉｎｔ　Ｓｏｕｒｃｅ　Ｃａｔａｌｏｇ（ＦＳＣ，　Ｍｏｓｈｉｒ　ｅｔ　ａ１．１９９２）ａｎｄ　ｔｈｅ　ｂｒｉｇｈｔｅｒ　Ｐｏｉｎｔ　Ｓｏｕｒｃｅ　Ｃａｔａｌｏｇ（ＰＳＣ．Ｊｏｉｎｔ　Ｓ　Ｓｃｉｅｎｃｅ　Ｗｏｒｋｉｎｇ　Ｇｒｏｕｐ　１９８８）．　Ｔｈｅ　Ｐｏｉ０ｔ　Ｓｏｕｒｃｅ　Ｃａｔａｌｏｇ　Ｒｅｄｓｈｉｆｌ　ｓｕｒｖｅｙ（ＰＳＣｚ）ｏｂｔａｉｎｅｄ　ｒｅｄｓｈｉｆｌｓ　ｆｏｒ　ａｌｌ　ｔｈｅ　ｓｏｕｒｃｅｓ　ｉｎ　ｔｈｅ　ＰＳＣ，ｗｈｉｃｈ　

ｐｒｏｖｉｄｅｓ　ａ　ｕｎｉｑｕｅ　ｃａｔａｌｏｇ　ｏｆ　ＩＲ　ｇａｌａｘｉｅｓ　ｉｎ　ｔｈｅ　ｎｅａｒｂｙ　ｕｎｉｖｅｒｓｅ．　

Ｂａｓｅｄ　ｏｎ　ＡＳ　ｒｅｄｓｈｉｆｔ　ｓｕｒｖｅｙｓ，ｔｈｅ　ＩＲ　ｌｕｍｉｎｏｓｉｔｙ　ｆｕｎｃｔｉｏｎ（ＬＦ）ｉｎ　ｔｈｅ　ｎｅａｒｂｙ　ｕｎｉｖｅｒｓｅ　ｈａｓ　ｂｅｅｎ　ｗｅｌｌ　

ｅｓｔａｂｌｉｓｈｅｄ（Ｓｏｉｆｅｒ　ｅｔ　ａ１．１９８７；Ｓａｎｄｅｒｓ＆Ｍｉｒａｂｅｌ　１９９６；Ｓａｎｄｅｒｓ　ｅｔ　ａ１．２００３）．Ａｂｏｕｔ　３０％ｏｆ　ｔｈｅ　ｌｕｍｉ—　ｎｏｓｉｔｙ　ｄｅｎｓｉｔｙ　ｉｓ　ｃｏｎｔｒｉｂｕｔｅｄ　ｆｒｏｍ　ｉｎｆｒａｒｅｄ　ｅｍｉｓｓｉｏｎｓ　ｉｎ　８－１　０００／ｚｍ（Ｓｏｉｆｅｒ＆Ｎｅｕｇｅｂａｕｅｒ　１　９９　ｌ　．Ｏｎ　ｔｈｅ　

ｏｔｈｅｒ　ｈａｎｄ，ａｌｔｈｏｕｇｈ　ｔｈｅ　ｌｕｍｉｎｏｕｓ　ｉｎｆｌａｒｅｄ　ｇａｌａｘｉｅｓ（ＬＩＲＧｓ：ＬＩＲ＞１０儿Ｌｎ）ａｎｄ　ｕｌｔｒａｌｕｍｉｎｏｕｓ　ｉｎｆｒａｒｅｄ　

ｇａｌａｘｉｅｓ（ＵＬＩＲＧｓ：ＬＩＲ＞１０　Ｌ　）ａｒｅ　ｒａｒｅ　ａｎｄ　ｏｎｌｙ　ａｃｃｏｕｎｔ　ｆｏｒ　５％ｏｆ　ｔｈｅ　ｔｏｔａｌ　ＩＲ　ｅｎｅｒｇｙ　ｄｅｎｓｉｔｙ　ｉｎ　

Ｓｕｐｐｏｒｔｅｄ　ｂｙ　ｔｈｅ　Ｎａｔｉｏｎａｌ　Ｎａｔｕｒａｌ　Ｓｃｉｅｎｃｅ　Ｆｏｕｎｄａｔｉｏｎ　ｏｆ　Ｃｈｉｎａ．

　Ｊ．Ｌ．Ｗａｎｇ　

ｎｅａｒｂｙ　ｕｎｉｖｅｒｓｅ（Ｓｏｉｆｅｒ＆Ｎｅｕｇｅｂａｕｅｒ　１９９ｌ：Ｋｉｍ＆Ｓａｎｄｅｒｓ　１９９８；Ｌｅ　Ｆ１ｐｃ’ｈ　ｅｔ　ａ１．２００５），ｔｈｅｙ　ａｒｅ　ｔｈｅ　

ｄｏｍｉｎａｎｔ　ｐｏｐｕｌａｔｉｏｎ　ｒｅｓｐｏｎｓｉｂｌｅ　ｆｏｒ　ｔｈｅ　ｂｕｌｋ　ｏｆ　ｔｈｅ　ｃｏｍｏｖｉｎｇ　ＩＲ　ｌｕｍｉｎｏｓｉｔｙ　ｄｅｎｓｉｔｙ　ａｔ　ｒｅｄｓｈｉｆｌ　ｂｅｙｏｎｄ　ｚ　

０．５（Ｌｅ　Ｆｌｐｃ’ｈ　ｅｔ　ａ１．２００５；Ｐ６ｒｅｚ　Ｇｏｎｚ￣ｌｅｚ　ｅｔ　ａ１．２００５）．Ｗｒｌｌｉｌｅ，ａｔ　ｒｅｄｓｈｉｆｔｓ　１ｅｓｓ　ｔｈａｎ　０．５，ａ　ｌａｒｇｅ　ｆｒａｃｔｉｏｎ　

Ｏｆ　ｔｈｅ　ＩＲ　ｅｎｅｒｇｙ　ｄｅｎｓｉｔｙ　ｉｓ　ｃｏｎｔｒｉｂｕｔｅｄ　ｂｙ　ｇａｌａｘｉｅｓ　ｗｉｍ　ＩＲ＜１０１１　ｎ．Ｇｉｖｅｎ　ｔｈａｔ　ｔｈｅｒｅ　ｉｓ　ａ　ｌｉｎｅａｒ　ｃｏｒｒｅ—　

ｌａｔｉｏｎ　ｂｅｔｗｅｅｎ　ｓｔａｒ　ｆｏｒｍａｔｉｏｎ　ｒａｔｅ（ＳＦＲ）ａｎｄ　ＩＲ　ｌｕｍｉｎｏｓｉｔｙ（Ｋｅｎｎｉｃｕｔｔ　１　９９８），ｉｎｖｅｓｔｉｇａｔｉｎｇ　ｔｈｅ　ｐｒｏｐｅｒｔｉｅｓ　

ｏｆ　ｇａｌａｘｉｅｓ　ｗｉｔｈ　ｌｏｗｅｒ　ｉｎｆｒａｒｅｄ　ｌｕｍｉｎｏｓｉｔｉｅｓ　ｗｉｌｌ　ｈｅｌｐ　ｔｏ　ｕｎｄｅｒｓｔａｎｄ　ｔｈｅ　ｓｔａｒ　ｆｏｒｍａｔｉｏｎ　ｐｒｏｃｅｓｓ．Ｈｏｗｅｖｅｒ，　ｕｎｔｉｌ　ｎｏｗ．ｔｈｅｒｅ　ａｒｅ　ｆｅｗ　ｗｏｒｋｓ　ｏｎ　ｄｅｔａｉｌ　ａｎａｌｙｓｉｓ　ｏｆ　ｔｈｅ　ＩＲ　ＬＦｓ　ｆｒｏｍ　ｄｉｆｆｅｒｅｎｔ　ｐｏｐｕｌａｔｉｏｎｓ　ｏｆ　ｌｏｃａｌ　ｇａｌａｘｉｅｓ，　

ｅｓｐｅｃｉａｌｌｙ　ｆｏｒ　ＩＲ　ｇａｌａｘｉｅｓ　ｗｉｔｈ　ｄｉｆｅｒｅｎｔ　ｍｏｒｐｈｏｌｏｇｉｅｓ．　

Ｉｎ　ｔｈｉｓ　ｐａｐｅｒ，ｗｅ　ｃｒｏｓｓ—ｃｏｒｒｅｌａｔｅ　ｔｈｅ　ＰＳＣｚ　ｃａｔａｌｏｇ　ｗｉｔｈ　ｔｈｅ　Ｓｌｏａｎ　Ｄｉｇｉｔａｌ　Ｓｋｙ　Ｓｕｒｖｅｙ（ＳＤＳＳ）Ｄａｔａ　

Ｒｅｌｅａｓｅ　５（ＤＲ５）．ａｎｄ　ｓｔｕｄｙ　ｔｈｅ　ｍｏｒｐｈｏｌｏｇｉｃａｌ　ｐｒｏｐｅｒｔｉｅｓ　ｏｆ　ｔｈｅｓｅ　ｓｔａｒ　ｆｏｒｍｉｎｇ　ｇａｌａｘｉｅｓ　ｉｎ　ｄｅｔａｉｌ．Ｏｕｒ　ｍａｉｎ　

ｇｏａｌ　ｉｓ　ｔｏ　ｄｅｒｉｖｅ　ｔｈｅ　ｍｏｒｐｈｏｌｏｇｉｃａｌｌｙ　ｄｅｐｅｎｄｅｎｔ　ＩＲ　ＬＦ＇ｈｅｎｃｅ　ｔｏ　ｋｎｏｗ　ｗｈｉｃｈ　ｔｙｐｅ　ｏｆ　ｇａｌａｘｉｅｓ　ｉｓ　ｔｈｅ　ｄｏｍｉｎａｎｔ　ｃｏｎｔｒｉｂｕｔｏｒ　ｔｏ　ｔｈｅ　ｃｏｍｏｖｉｎｇ　ＩＲ　ｅｎｅｒｇｙ　ｄｅｎｓｉｔｙ　ｉｎ　ｎｅａｒｂｙ　ｕｎｉｖｅｒｓｅ．Ｔｈｅ　ｓｔｒｕｃｔｕｒｅ　ｏｆ　ｔｈｅ　ｐａｐｅｒ　ｉｓ　ａｓ　ｆｏｌｌｏｗｓ．　

Ｉｎ　Ｓｅｃｔｉｏｎ　２．ｗｅ　ｄｅｓｃｒｉｂｅ　ｈｏｗ　ｗｅ　ｃｒｏｓｓ—ｃｏｒｒｅｌａｔｅ　ｔｈｅ　ＳＤＳＳ　ＤＲ５　ｄａｔａ　ｗｉｔｈ　ｔｈｅ　ＰＳＣｚ　ｄａｔａ，ａｎｄ　ｈｏｗ　ｗｅ　

ｃｏｎｓｔｒｕｃｔ　ｆｉｖｅ　ｖｏｌｕｍｅ．１ｉｍｉｔｅｄ　ｓａｍｐｌｅｓ．Ｉｎ　Ｓｅｃｔｉｏｎ　３，ｗｅ　ｐｒｅｓｅｎｔ　ａｎｄ　ｄｉｓｃｕｓｓ　ｔｈｅ　ｓｔａｔｉｓｔｉｃａｌ　ｒｅｓｕｌｔｓ．Ｉｎ　ｔｈｅ　

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我们应该谈谈宇宙英文作文

我们应该谈谈宇宙英文作文

我们应该谈谈宇宙英文作文

英文：

Talking about the universe is a topic that fascinates

me. The vastness and complexity of the universe are mind-boggling, and there is still so much we don't know about it.

One of the things that intrigues me the most is the

possibility of extraterrestrial life. The idea that there

could be other intelligent beings out there in the universe

is both exciting and humbling.

One of the things that makes the search for

extraterrestrial life so challenging is the sheer size of

the universe. There are billions of stars in our galaxy

alone, and billions of galaxies in the observable universe.

The distances between stars and galaxies are so vast that

it would take thousands or even millions of years for us to

travel to them. This is why we rely on telescopes and other

instruments to study the universe.

短文填空题专训(含答案)2020-2021学年外研版八年级英语下册

短文填空题专训(含答案)2020-2021学年外研版八年级英语下册

《外研版8下短文填空题专训》（同步课堂） 制作人：刘节

1 M 1 Feelings and impressions

Unit2P4

Hi, Lingling,

Thanks for your last message. It was great 1. _______ hear from you, and I can't wait to meet you.

I hope you will know me from my photo when I 2._______at the airport. I'm quite tall, with short fair hair, and I wear

glasses. I'll wear jeans and a T-shirt for the 3._______, but I'll also carry my warm coat. I've got your photo-you look very

pretty. I'm sure we'll find 4._______ other!

Thanks for telling me about your hobbies. You sound 5._______ like me! I spend a lot of time 6._______classical music

with my friends at school,but I also like dance music--I love dancing! I enjoy sports as 7._______, especially tennis. My

brother is in the school tennis team--I'm very 8._______ of him! He's good at everything, but I'm not. Sometimes I get bad

关于宇宙的英语作文,不少于80字

关于宇宙的英语作文,不少于80字

关于宇宙的英语作文,不少于80字

全文共6篇示例，供读者参考

篇1

The Universe is a really really big place! It's like super crazy

huge and full of all kinds of cool stuff. There are stars and planets

and galaxies and black holes and aliens (maybe). It's so big that

we can't even really wrap our little kid brains around how big it

is.

But even though the Universe is so big, we still know some

stuff about it. Scientists have been studying it for a long long

time and they have learned a lot of things. They know that the

Universe is always expanding, which means it's getting even

bigger all the time. And they know that there are different

galaxies out there, like the Milky Way where we live.

There are also a bunch of planets in our own Solar System,

like Mercury, Venus, Earth (that's us!), Mars, Jupiter, Saturn,

Uranus, and Neptune. And there used to be Pluto too, but they

2004年10月英语(二)试题及答案--解析

2004年10月英语(二)试题及答案--解析

2004年下半年英语（二）试题及答案

2004年下半年高等教育自学考试全国统一命题考试英语二

第一部分

选择题（共50分）

I. Vocabulary and Structure (10 point, 1 point for each item) 从下列各句四个选项中选出一个最佳答案，并在答题卡上将相应的字母涂黑．

1. It offers us a fuller sense of being intensely alive from to moment. A. time B. moment C. period D. instant 2. It may

be worth remembering that John Major didn’t himself go to Oxford, most of his ministers did. A. after B. since C. while

D. if 3. The effects of rapid travel the body are far more disturbing than we realize. A. on B. in C. for D. to 4. Her

powers of persuasion were no avail. A. for B. by C. with D. to 5. There is little likelihood that a panel of five wants to

go through the of all shaking hands with you. A. process B. prospect C. precedent D. presence 6. It is the right to

change employers which employment from slavery. A. distinguishes B. derives C. releases D. relieves 7. It is touching