What do you know about the sea? We know that it looks very pretty when the sun is shining on it. We also know that it can be very rough when there is a strong wind. What other things do we know about it?
The first thing to remember is that the sea is very big. When you look at the map of the world you will find there is more water than land. The sea covers three quarters of the world.
The sea is also very deep in some places. It is not deep everywhere. Some parts of the sea are very shallow. But in some places the depth of the sea is very great. There is one spot, near Japan, where the sea is nearly 11 kilometers deep! The highest mountain in the world is about 9 kilometers high. If that mountain were put into the sea at that place, there would be 2 kilometers of water above it! What a deep place!
If you have swum in the sea, you know that it is salty. You can taste the salt. Rivers, which flow into the sea, carry salt from the land into the sea. Some parts of the sea are saltier than other parts. There is one sea, called the Dead Sea, which is very salty. It is so salty that swimmers cannot sink! Fish cannot live in the Dead Sea!
In most parts of the sea, there are plenty of fishes and plants. Some live near the top of the sea. Others live deep down. There are also millions of tiny living things that float in the sea. These floating things are so small that it is hard to see them. Many fish live by eating these.
The sea can be very cold Divers who go deep down in the sea, know this. On the top the water may be warm. When the diver goes downwards, the sea becomes colder and colder. Another thing happens. When the diver goes deeper, the water above presses down on him. It squeezes him. Then the diver has to wear clothes made of metal. But he cannot go very deep. Some people who wanted to go very deep used a very strong diving ship! They went down to the deepest part of the sea in it. They went down to a depth of eleven kilometers!
练习:
1. When does the sea look beautiful?
A) When it is calm
B) When the weather is fine
C) When there is a strong wind
D) When there is a storm
2. How much of the earths surface does land cover?
A) 15%
B) 25%
C) 30%
D) 45%
3. Why does the author cite the sea somewhere near Japan?
A) To show that the sea in some places is very deep.
B) To show that the sea in some places is very shallow
C) To show that its depth is 9 kilometers greater than the height of the highest mountain
D) To show that its depth is 11 kilometers greater than the height of the highest mountain
4. Which of the following statements about the Dead Sea is NOT true?
A) There are plenty of fishes in it.
B) It is a safe place for swimmers.
C) It is extremely salty.
D) No fish can be found in it.
5. Why cant people go very deep in the sea?
A) Because the deepest part of the sea is very cold.
B) Because the deepest part of the sea is very rough.
C) Because the pressure of the water at great depths is unendurable.
D) Because fierce fish usually live there.
Key: BBAAC
体坛英语资讯:Lin Dan, Yamaguchi crash out, Momota storms into last 16 at badminton worlds
国际英语资讯:African leaders pay tribute to late Zimbabwes Mugabe at state funeral in Harare
6岁女孩天使心 为癌症儿童捐出长发
情敌见面分外眼红?奥兰多痛揍比伯
学会和解
70年了,从《大闹天宫》到《霸王别姬》,有哪些电影值得珍藏?
体坛英语资讯:Dutch cyclist Dumoulin moves from Sunweb to Jumbo-Visma
美国签证系统崩溃 全球赴美签证暂停
体坛英语资讯:2023 FIFA Womens World Cup bid draws interest
最适合学外语的7部动画片,你看过几个?
体坛英语资讯:PSGs Rimane joins FC Hermannstadt
狗狗就算再温顺 也会羡慕嫉妒恨
体坛英语资讯:Fluminense name Oliveira as new manager
体坛英语资讯:Shandong Luneng beat Shanghai SIPG to enter CFA Cup final
空难不断 今年仍是历史最安全一年
蝙蝠侠大战超人 最炫英雄混搭风
国际英语资讯:Saudi-led coalition launches probe into drone attacks against oil facilities
菲律宾美人鱼学院:教你如何做美人鱼
小矮人也有真爱 印度侏儒矮妻子61厘米
国际英语资讯:Million dollar solid gold toilet stolen from British palace
国内英语资讯:Tourism festival kicks off in Shanghai
为什么瑞典男人有那么长的产假?
中国广场舞风生水起 跳舞大妈获商业赞助
谎言重复一百遍,是不是自己也会信?
凯瑟琳·泽塔琼斯自曝曾患抑郁症
国内英语资讯:China to start Mandarin promotion events
棱镜门余波又起 苹果被曝留后门
办公室有人哭了 同事们该如何应对
国内英语资讯:Commentary: Constructive interactions pave way for China-U.S. trade talks
国内英语资讯:China Focus: Shanghai tourism festival witnesses consumption upgrade
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |