【題目】

1What is true about the Milky Way?

A.There are only stars inside it.

B.There is a black hole at its center.

C.It’s the biggest spiral galaxy in the universe.

D.It takes 100,000 years to get there from Earth.

2Which of the following is the main factor in categorizing galaxies?

A.Shape.B.Size.

C.Number of stars.D.Distance from the sun.

3Which of the following galaxies can be classified as irregular?

A.Whale Galaxy — similar to the Milky Way both in size and shape.

B.Cygnus A (3C 405) Galaxy — the brightest egg shape we can observe.

C.Cigar Galaxy — long and narrow galaxy that looks like an ashy cloud.

D.Sunflower Galaxy — galaxy with multiple arms radiating from its bright core.

【答案】

1B

2A

3C

【解析】

這是一篇說明文。文章主要介紹了一些宇宙中星系的情況,如螺旋星系、橢圓星系和不規(guī)則星系等。

1細節(jié)理解題。根據(jù)SPIRAL GALAXY部分中Our galaxy has a huge black hole at its center that billions of stars revolve around.可知,我們的星系中心有一個巨大的黑洞,數(shù)十億顆恒星圍繞著它旋轉(zhuǎn)。由此可知,銀河系中間有一個巨大的黑洞。故選B

2細節(jié)理解題。根據(jù)IRREGULAR GALAXY部分中There are many other shapes of galaxies that aren’t spiral or elliptical. They all fit into irregular category.可知,不規(guī)則的星系部分中還有許多其他星系的形狀不是螺旋或橢圓。它們都屬于不規(guī)則的類別。由此可知,星系主要是根據(jù)形狀來進行分類。故選A。

3推理判斷題。根據(jù)IRREGULAR GALAXY部分中There are many other shapes of galaxies that aren’t spiral or elliptical. They all fit into irregular category.可知,不規(guī)則的星系部分中還有許多其他星系的形狀不是螺旋或橢圓。它們都屬于不規(guī)則的類別。結(jié)合選項可推知,狹長的,看起來像一片灰蒙蒙的云的雪茄星系可以被歸類為不規(guī)則星系。故選C。

直接信息題

對此類題型,考生可以首先從問題中找到關鍵詞,然后以此為線索,運用略讀及查閱的技巧在文中迅速尋找這一細節(jié),找到后再把這一部分內(nèi)容仔細閱讀一遍,仔細比較所給選項與文中細節(jié)的細微區(qū)別,在準確理解細節(jié)的前提下,最后確定最佳答案。如第一小題,根據(jù)SPIRAL GALAXY部分中Our galaxy has a huge black hole at its center that billions of stars revolve around.可知,我們的星系中心有一個巨大的黑洞,數(shù)十億顆恒星圍繞著它旋轉(zhuǎn)。由此可知,銀河系中間有一個巨大的黑洞。故選B

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