here is how it all started
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alostman 共回答了21个问题
|采纳率95.2%- 这里是一切开始的源头
- 1年前
虫虫333 共回答了3个问题
|采纳率- vbnvbnvbnvn
- 1年前
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- 英语阅读理解帮忙One thing we do not know is how life began in the se
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One thing we do not know is how life began in the sea about 3,000,000,000 years ago.
Scientists believe that life started when some tiny substances(物质) met other substances under exactly the right conditions.In the warm waters of an ancient seacoast,a little mass(一小团物质) was formed of water,chemicals,and salts.This little mess had something which nothing on earth had had before:the power to recreate itself to fit surrounding conditions.In a word:life.
If life could be created then,why does it not happen today?Part of the answer is that the world now is very different from what it was when it was new.Long ago there was no other life to destroy very those very small bits of living matter.Now it is probable that they would be destroyed by bacteria(细菌).
The oldest age for life was once thought to be 1,900,000,000 years.But in 1965,Dr.Melvin Calvin of the university of California,and a group of scientists,found tiny-substances that were 2,700,000,000 years old.In Africa other tiny substances were found that were 3,000,000,000 years old.It was formerly thought that no life had existed on earth during this period of time.
Today we have thousands of different kinds of plant and animal life.Yet all of them have one thing in common:their origin(起源) in the sea.
57.Now people know _____.
A.exactly how life came into being
B.nothing about life
C.for sure life started 3,000,000,000 years ago
D.not exactly how and life started
58.What were the most important thing in the forming of life?
A.Water,chemicals B.Water,chemicals,mass and the right conditions
C.Chemicals and salts D.Water,chemicals,salts and the right conditions
59.The mass in this passage was____
A.nothing unusual compared with any other substance
B.something that could grow huge
C.something that could produce masses of its own kind
D.something could grow very fast
60.Life could be recreate only when____
A.it had no natural enemies B.people know how to create
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One thing we do not know is how life began (57)in the sea about 3,000,000,000 years ago.
Scientists believe that life started when some tiny substances(物质) met other substances under exactly the right conditions.In the warm waters of an ancient seacoast,a little mass(一小团物质) was formed of water,chemicals,and salts(58).This little mess had something which nothing on earth had had before:the power to recreate itself to fit surrounding conditions.In a word:life(59).If life could be created then,why does it not happen today?Part of the answer is that the world now is very different from what it was when it was new.Long ago there was no other life to destroy very those very small bits of living matter(60).Now it is probable that they would be destroyed(毁坏) by bacteria(细菌).
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1、That is the way it goes.
2、That is how it goes.
3、That is all you know about it.
4、That will be the day.
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A那你就错了.
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不可能有那么一天的.
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- One of the most difficult questions to answer is how much a
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another factor we must take into consideration is how socially useful a man’s work is, regardless of the talents he may bring to it. most people would agree that looking after the sick or teaching children is more important than, say, selling secondhand cars or improving the taste of toothpaste by adding a red stripe to it. yet it is almost certain that the used car salesman earns more than the nurse, and that research chemist earns more than the school teacher.
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b. we should pay people according to their talents
c. market forces will determine how much a person is paid
d. qualified people should be the highest paid
77. the argument of the “psychic wage” is used to explain why ______.
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|采纳率85.7%My Heart Will Go On(我心依旧)
电影《泰坦尼克号》的插曲
歌手:Celine Dion (席琳·迪翁)
Every night in my dreams每一个夜晚,在我的梦里
I see you,I feel you 我看见你,我感觉到你
That is how I know you go on 这就是我如何知道你会继续
Far across the distance and spaces between us 跨越我们心灵的空间
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Near far wherever you are 无论你如何远离我
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Near far wherever you are 无论你离我多么遥远
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