Question

【題目】Whatever our differences as human beings are, we all think we’re more like the rest of the animal world than we realize. It is said that we share 40 per cent of our genetic（遺傳的）structure with the simple worm.

But that fact has helped Sir John Sulston win the 2002 Nobel Prize for Medicine. Sir John is the founder of the Sanger Institute in Cambridge, which was set up in 1992 to get further understanding of the human genome（染色體組）.

To help them do this, they turned to the worm. The nematode（線蟲類的）worm is one of the earliest creatures on planet earth. It is less than one millimeter long, completely transparent and spends its entire life digging holes through sand. But it still has lots to say about human life, and what can be done to make it better.

What the worm told Sir John and his colleagues was that each of cells in the human body is programmed like a computer. They grow, develop and die according to a set of instructions that are coded in our genetic make-up.

Many of the diseases that humans suffer from happen when these instructions go wrong or are not obeyed. When the cell refuses to die but carries on growing instead, this leads to cancer. Heart attacks and diseases like AIDS cause more cell deaths than normal, increasing the damage they do to the body. Sir John was the first scientist to prove the existence of programmed cell death.

【1】Sir John Sulston got a Nobel Prize for Medicine because he has .

A．found that human beings are similar to the worm

B．got the fact we share 40 per cent of our genetic structure with the simple worm

C．found the computer which controls each of the cells in the human body

D．proved that cell death is programmed

【2】People might be seriously ill if the cells in their body .

A．grow without being instructed

B．die regularly

C．fail to follow people’s instructions

D．develop in the human body

【3】The underlined word “they” (paragraph 5) refers to .

A．cell deaths B．diseases C．instructions D．cells

【4】What is the subject discussed in the text?

A．The theory of programmed cell deaths.

B．A great scientist—Sir John Sulston.

C．The programmed human life.

D．Dangerous diseases.

Answer 1

【答案】

【1】D

【2】A

【3】B

【4】A

【解析】

試題分析：本文主要介紹了Sir John所研究的編程性細胞死亡programmed cell deaths；并交代了Sir John的研究背景，并通過舉例詳細闡述了這一科學原理。

【1】D 細節(jié)理解題。根據(jù)文章最后一句Sir John was the first scientist to prove the existence of programmed cell death.可知Sir John是第一個證明編程性細胞死亡的人，他還因此獲得了諾貝爾醫(yī)學獎。

【2】A 推理判斷題。根據(jù)最后一段第一句Many of the diseases that humans suffer from happen when these instructions go wrong or are not obeyed.可知當人體內(nèi)的細胞沒有按照指令生長的時候，人們就會患病。在最后一段中還接著以癌癥和艾滋病為例證明了這一說法，說明不按照指導生產(chǎn)的細胞是人患病的主要原因。故A正確。

【3】B 詞義猜測題。本題屬于詞義猜測題中的代詞指代，根據(jù)本句Heart attacks and diseases like AIDS cause more cell deaths than normal, increasing the damage they do to the body.心臟病和艾滋病主要的疾病導致更多的細胞死亡，這增加了這些疾病對身體帶來的破壞。所以本句中的they就指代前句中的Heart attacks and diseases like AIDS.故B正確。

【4】A 主旨大意題。本文主要介紹了Sir John所研究的編程性細胞死亡programmed cell deaths；并交代了Sir John的研究背景，并通過舉例詳細闡述了這一科學原理，CD的話題太大，B項不是本文主要內(nèi)容。故A正確。