快速导航
学历类
职业资格
公务员
医卫类
建筑工程
外语类
外贸类
计算机类
财会类
技能鉴定
Scattered through the seas of the world are billions of tons of small plants
and animals called plankton. Most of these plants and animals are too small for
the human eye to see. They drift about lazily with the currents, providing a
basic food for many larger animals. Plankton has been described as the
equivalent of the grasses that grow on the dry land continents, and the
comparison is an appropriate one. In potential food value however, plankton far
outweighs that of the land grasses. One scientist has estimated that while
grasses of the world produce about 49 billion tons of valuable carbohydrates
each year. The sea’s plankton generates more than twice as much.
Despite its enormous food potential, little effort was made until recently to
farm plankton as we farm grasses on land. Now marine scientists have at last
begun to study this possibility, especially as the sea’s resources loom even
more important as a means of feeding an expanding world population.
No one yet has seriously suggested that “planktonburgers” may soon become
popular around the world. As a possible farmed supplementary food source,
however, plankton is gaining considerable interest among marine scientists.
One type of plankton that seems to have great harvest possibilities is a tiny
shrimplike creature called krill. Growing to two or three inches long, krill
provide the major food for the giant blue whale, the largest animal ever to
inhabit the Earth. Realizing that this whale may grow 100 feet and weigh 150
tons at maturity, it is not surprising that each one devours more than one ton
of krill daily.
Krill swim about just below the surface in huge schools sometimes miles wide,
mainly in the cold Antarctic. Because of their pink color, they often appear as
a solid reddish mass when viewed from a ship or from the air. Krill are very
high in food value. A pound of these crustaceans contains about 460
calories—about the same as shrimp or lobster, to which they are related.
If the krill can feed such huge creatures as whales, many scientists reason,
they must certainly be contenders as new food source for humans.
1.Which of the following best portrays the organization of the passage?
A.The author presents the advantages and disadvantages of plankton as a food
source.
B.The author quotes public opinion to support the argument for farming
plankton.
C.The author classifies the different food sources according to amount of
carbohydrate.
D.The author makes a general statement about plankton as a food source and
then moves to a specific example.
2.According to the passage, why is plankton regarded to be more valuable than
land grasses?
A.It is easier to cultivate.
B.It produces more carbohydrates.
C.It does not require soil.
D.It is more palatable.
3.Why does the author mention “planktonburgers”?
A.To describe the appearance of one type of plankton.
B.To illustrate how much plankton a whale consumes.
C.To suggest plankton as a possible food sources.
D.To compare the food values of beef and plankton.
4.What is mentioned as one conspicuous feature of krill?
A.They are the smallest marine animals.
B.They are pink in color.
C.They are similar in size to lobsters.
D.They have grass like bodies.
5.The author mentions all of the following as reasons why plankton could be
considered a human food source except that it is ___.
A.high in food value.
B.in abundant supply in the oceans.
C.an appropriate food for other animals.
D.free of chemicals and pollutants.
Passage 4
Questions 16 to 20 are based on the following passage:
I recently wrote an autobiography in which I recalled many old memories. One
of them was from my school days, when our ninth grade teacher, Miss Raber, would
pick out words from the Reader’s Digest to test our vocabulary.
Today, more than 45 years later, I always check out “It pays to Enrich Your
Word Power” first when the Digest comes each month. I am impressed with that
idea, word power. Reader’s Digest knows the power that words have to move
people—to entertain, inform, and inspire. The Digest editors know that the big
word isn’t always the best word. Take just one example, a Quotable Quote form
the February 1985 issue: ”Time is a playful thing. It slips quickly and drinks
the day like a bowl of milk.”
Nineteen words, only two of them more than one syllable, yet how much they
convey! That’s usually how it is with Reader’s Digest. Small and simple can be
profound.
As chairman of a foundation to restore the Statue of Liberty, I’ve been
making a lot of speeches lately. I try to keep them fairly short. I use small
but vivid words: words like “hope”, “guts”, “faith”, “dreams”. Those are words
that move people and say so much about the spirit of America.
Don’t get me wrong. I’m not against using big words, when it is right to do
so, but I have also learned that a small word can work a small miracle—if it’s
right word, in the right place, at the right time. It’s a “secret” that I hope
never forget.
16. The passage is mainly about .
A. one of the many old memories
B. using simple words to express profound ideas
C. Reader’s Digest and school speeches
D. how to make effective speeches
17. It seems that Reader’s Digest is a magazine popular with .
A. people of all ages B. teenagers C. school teachers D. elderly readers
18. The example the author gives in the second paragraph might mean .
A. one spends his day playing and drinking
B. don’t waste your time as one does
C. time slips easily if you don’t make good use of it
D. time is just like drinking milk from a bowl
19. The author’s “secret” is .
A. to avoid using big words at any time
B. to use words that have the power to move people
C. to work a miracle by using a small word
D. to use small and simple words where possible
20. Accoeding to the author, well-chosen words can give people .
A. hope, courage and ideas
B. confidence, determination and strength
C. pleasure, knowledge and encourage
D. entertainment, information and power
Questions 16 to 20 are based on the following passage:
