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歷年專八英語試題改錯(cuò)練習(xí)及答案
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What is a black hole? Well, it is difficult to answer the question,
as the terms we would normally use to describe a scientific phenomenon __1__are adequate here. Astronomers and scientists think that a black hole is __2__a region of space which matter has fallen and from which nothing can __3__
escape—not even light. But we can’t see a black hole. A black hole __4__exerts a strong gravitational pull and yet it has no matter. It is only space—or thus we think. How can this happen? __5__
The theory is that some stars explode when their density increases to a particular point; they “collapse” and sometimes a supernova occurs.
The collapse of a star may produce a “White Dwarf” of a “neutronstar”—
a star which matter is so dense that if continually shrinks by the force of __6___its own gravity. But if the star is very large, this process of shrinking may be so intense that a black hole results in. Imagine the earth reduced to the __7__size of a marble, but still having the same masses and a stronger __8__gravitational pull, and you have some ideas of the force of a black hole. __9__And no matter near the black hole is sucked in. __10__
參考答案及解析:
supernova 名詞，(天文)超新星
1. 將as 改為since或者because。在表示原因的連接詞中，只有as引導(dǎo)的原因狀語從句不能位于主句之后，只能位于句首。
2 .將adequate 改為inadequate，或者在are后加not。從邏輯上分析，因?yàn)槲覀儞碛械?科學(xué)術(shù)語“不充足”，所以才無法回答這個(gè)問題，所以用否定形式。
3. 在which 前加into。這是一個(gè)定語從句，意思是“黑洞是太空中物質(zhì)可以掉進(jìn)去的地方”，所以定語從句應(yīng)該為“into which matter has fallen”。
4. 將but 改為 so。 上文已提到“連光都無法從黑洞中逃出”，所以我們根本無法看到黑洞。這里應(yīng)該是因果關(guān)系，而不是轉(zhuǎn)折關(guān)系。
5 .將thus改為so。這句話的意思是“那只是空間—或者我們認(rèn)為它只是空間”。so做 think 的賓語，thus 只能做連詞，不能做賓語。
6. 將which 改為whose。這個(gè)定語從句的意思是“它是一顆星，其密度非常大，由于自身的引力，它在不斷地收縮”。matter 屬于star，所以關(guān)系代詞應(yīng)該用whose。
7 .去掉in。result為不及物動(dòng)詞，意為“形成了”，而“result in sth。”意為“導(dǎo)致某結(jié)果”。
8. 將masses 改為mass。mass 可指“大量的物質(zhì)”，而“the masses”特指“勞動(dòng)群眾”，用在此處不妥。
9 .將ideas 改為idea。“idea”在表達(dá)“印象”時(shí)，為不可數(shù)名詞，不可以用復(fù)數(shù)。
10. 將no改為any。分析便知，任何在黑洞附近的東西都會(huì)被吸進(jìn)去。
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