题目内容
Unless action is taken immediately, there is a chance that all the oceans of the world will be dead by the year 2010. How can this possibly happen?
We have already seen that people allow all sorts of waste products to flow into the sea. It is almost impossible to measure how much waste water and industrial waste end up in our oceans, but we can find out how much oil is poured into them legally and illegally. It is illegal to pour oil into the sea close to the shore, but when a ship is many miles out to sea there are no such rules. Scientists have different ideas as to the amount of oil put into the sea, but the lowest figure for oil poured in European waters alone is about 200,000 tons every year. Some people say the figure could be ten times as high.
It is not only our coasts that suffer from oil pollution. Among other things, many shellfish - oysters (牡蛎) and mussels(贻贝), for example - now have high amounts of poisonous substances. Next time you have shellfish to eat, how can you be sure that they are free from oil pollution? You cannot see the effects and you cannot taste them, either. It is really quite a problem.
1.This passage is mainly about_________.
A.pollution in the air B.the amount of the oil in the sea
C.the amount of poison in shellfish D.oil pollution in the waters.
2.According to the passage, what is the main cause of oil pollution?
A.Oil ships which meet and strike each other.
B.Oil poured on land when the oil tanks are cleaned out.
C.Oil coming out of the bottom of the sea.
D.Oil from waste water and industrial waste.
3.According to the passage, which of the following is illegal?
A.Pouring oil into the sea close to the shore.
B.Allowing clean materials to flow into the waters.
C.Smoking.
D.Going fishing when the water is polluted by oil.
4.The figure for oil poured in European waters alone is .
A.no more than 2,010,000 tons every month
B.1,000,000 tons every year
C.more than 200,000 tons every month
D.more than 200,000 tons every year
5.Which of the following statements is WRONG according to the passage?
A.All the oceans in the world are polluted by oil.
B.The water body of the earth may be dead by the year 2010.
C.It is not only our coasts that suffer from oil pollution.
D.Some kinds of the living things in the waters have been poisoned and we must be careful of them.
DDADA
The whole body is covered with skin.The surface of the skin is dead(like the hair and the nails),but it is made from a living layer(层)just under the surface.The outside dead layers wear off(磨损)all the time,with new ones replacing them,and the body forms a totally new skin every three weeks.
The skin protects the body from the outside world and it passes information from the outside.It helps to keep water in the body and to keep the body at the same temperature.Becteria(细菌)can’t get in through the skin unless it is damaged.
If the weather is cold,the blood vessels(血管)in the skin squeeze down,or contract(收缩),so that as little blood as possible comes near the surface.This means that less warmth is lost to the outside.This makes the skin look pale,or even “blue”.At the same time,the hairs on the skin are pulled upright by tiny muscles.
When it is hot,the blood vessels expand(扩大),or get wider again,to allow plenty of blood to run near the surface of the skin.This helps the body to lose heat,and the skin may look red.At the same time,the sweat glands(汗腺)produce more sweat,which cools the skin.
If your skin has ever been numb(麻木的),you will realize how important the feeling from the skin is.Nerves(神经)in the skin are sensitive(敏感的)to heat and cold,sharpness,hardness and softness,wetness and dryness and pain.If one is not able to feel these things,which can act as warnings,he is likely to be burned,cut or hurt in other ways.
The colour of the skin depends on special colour cells(细胞).These are just below the top layers of the skin.They are needed as protection from some harmful ray of the sun.The stronger the sun is,the more important it is to have a dark skin.People with pale skins may “tan”(晒黑)in the sun.This happens when the body produces extra colour cells in the skin for protection.In the sun,the skin produces a vitamin(vitamin D)which is needed for strong bones.
【小题1】Which of the following statements is NOT true?
A.Our hair and nails are dead like the surface of the skin. |
B.There is skin all over our body. |
C.The skin of our bodies will be completely different in three weeks. |
D.The surface of the skin is made of a living layer. |
A.the functions of the skin |
B.the information from the outside |
C.the water in the body |
D.the temperature of the body |
A.when one’s skin is numb |
B.when one is ill |
C.when the skin is cut |
D.when the sweat glands produce more sweat |
A.allow more blood near | B.make the skin look blue |
C.keep warmth | D.help the body lose heat |
A.the rays of the strong sun | B.colour cells |
C.top layers of the skin | D.vitamin D |