题目列表(包括答案和解析)
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If a man in a spaceship looked down at the earth, he would see mainly water. He might think that the earth was one giant ocean with little land.
Nearly seven-tenths of the earth's surface is covered by water. One ocean, the Pacific (
太平洋), has an area of 63 million square miles.Many years ago people thought that the land under all this water was flat. Now they know that this is not true. There are as many mountains under the sea as there are on the land.
At first, there was very little salt in the sea. The salt was brought into the, sea by rivers. It is possible to measure the age of the earth by measuring the amount of salt in the sea. Scientists can calculate how many years it took for this amount of salt to be carried from the land into the sea.
(1)Nearly ____of the earth's surface is covered by water.
[ ]
A .seven-tenths |
B .three-tenths |
C .seven-tenth |
D .three-tenth |
(2)Long time ago people thought that the land under the sea was_____
.[ ]
A .mountains |
B .a ball fo gas |
C .full of coal |
D .flat |
(3)In fact, under the sea the land _________
.[ ]
A .is full of mountains |
B .is almost flat |
C .is full of coal |
D .is a ball of gas |
(4)At first, there was ________
.[ ]
A .a little salt in the sea |
B .much salt in the sea |
C .little salt in the sea |
D .no salt in the sea |
(5)We can know the age of the earth by measuring ________
.[ ]
A
.the amount of water in the seaB
.the amount of flat in the seaC
.the amountofmountainsintheseaD
.the amount of salt in the sea短文填空
Learning the language of a country isn't enough.If you want to have a pleasant visit, find out as much as(1)________about the manners and customs of your hosts.You will probably be(2)________ to see just how different they can be from your own.
A(3)________ to India would do well to remember that people there consider it impolite to use the left hand for passing food at the table.The left hand should be(4)________ for washing yourself.Also in India, you might see a man(5)________ his head at another and think that he is disagreeing.But in many parts of India this movement just(6)________ agreement or acceptance.
At a meal in the Arab countries, you will find that the drinking cup is always refilled as soon as you drink it.The way to say that you have had(7)________ is to take the cup or glass in your hand and swing it a little from side to side or put your hand over the top.
In Europe it is quite usual to cross your legs when sitting talking to someone,(8)________ at an important meeting.(9)________ this when meeting an important person in Thailand, however, could cause(10)________.Also when in Thailand, do not touch the head of an adult-it's just not done.
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