Fromthemomentwe’reborn,webegintodie,butdeathisactuallya...

问题详情：

From the moment we’re born, we begin to die, But death is actually a fairly

new invention. As a natural way of life, death has been around for only a small percentage of the time that life has been on our planet.

Out planet is about 4.6 billion years old. Life began about 3.8 billion years ago. For most of those 3.8 billion years, living creatures were immortal(不死的), and did not die. From 3.8 billion years ago to one billion years ago, each living creature

was made up of a single cell. A single-celled creature would grow to a certain size, and then split into two, and each of those two cells would then keep on growing until they divided and so forth. These single–celled creatures would never die of old age. They might die from being run over by a rolling stone, or from being eaten by another bigger single-celled creature, but apart from that they would not die.

But about one billion years ago, some of the single-celled beings evolved into

creatures with many different types of cells. These new creatures had some cells for thinking, other cells for moving, other cells for digestion, and so on. And at the same time, death was born. It seems strange, but there actually are a few advantages of dying---at least, as far as the species is concerned.

Firstly, an immortal species can’t adapt to any changes in the environment. Only their children, with a slightly different DNA, can. Another disadvantage of immortality is that the parents and their kids would be fighting for the same amount of food. And thirdly, the DNA of these immortal creatures would constantly be damaged by radiation from space, and chemicals in the

environment, leading to more shortcomings in the eggs carried by the mother.

56.    What does the writer mean by saying that death is a new invention? (No more than 20 words)

57.    What does the word “evolved” underlined in Paragraph 3 mean? (No more than 2 words)

58.    Do singled-celled creatures die? If so, what do they die from?

(No more than 15 words)

59.    According to the passage, what’s the relationship between mortal creatures and immortal creatures?  (No more than 10 words)

60.    What’s the main idea of the last paragraph?  (No more than 10 words)

【回答】

71.    Death has been around for only a small percentage of the time that life has been on our planet.

72.    Grew/Developed.

73.    Yes. They die from being run over or being eaten by another creature. (三个采 分点：1. Yes. 2. Die from being run over 3. Die from being eaten. 三个点齐全给两 分，少一个点扣一分)

74.    Immortal creatures evolve/develop into mortal creatures

The advantages of death./ The disadvantages of immortality.

知识点：阅读表达

题型：未分类