In writing the article, the writer is quite______.A.subjectiveB.optimisticC.pessimisticD.o
In writing the article, the writer is quite______.
A.subjective
B.optimistic
C.pessimistic
D.objective
In writing the article, the writer is quite______.
A.subjective
B.optimistic
C.pessimistic
D.objective
A.Y
B.N
C.NG
A.that
B.what
C.it
D.there
Consonants can be described in terms of
A.voicing.
B.place of articulation.
C.manner of articulation.
D.all of the above.
易燃物品的英文翻译是()
A.inflammable
B.explosive
C.corrosive
D.fammable article article article artible
le.()
此题为判断题(对,错)。
Which article will be accepted by the English Teaching and Learning in Colleges?
A.An article on phonetics with 5, 000 words
B.A speech printed on a B5 paper
C.A teaching plan less than 4, 000
D.A translated article without the original
Steve admires Ron Bell because
A.he prepares traditional dishes.
B.he writes excellent articles about food.
C.he makes a point of using local produce.
Changes in climate that had already taken place are manifested __1__from the decrease in extent and thickness of Arctic sea ice, perma- __2__frost thawing, coastal erosion, changes in ice sheets and ice shelves, altered distribution and abundance of species. __3__Nowadays snows melt earlier in the springtime. Lakes, rivers and bogs freeze much more later in the autumn. Reindeer herding __4__becomes more difficult so the ice is weak and may give way. __5__Nowadays winters are much colder than they used to be. __6__Occasionally during winter time it rains. We never expected this;we could not be ready for this. It is very strange. The cycle of the yearly calendar has been disturbed greatly. Warming over northern land areas has been very greater than elsewhere in the world. The __7__changes are due to human modification of the concentration of greenhouse gases during the 20th century, leading quite directly to the projections the Artic will warm by several times as much during the __8__
21st century as it did during the 20th century. The amplified warming in Arctic, in turn, directly contributes to overall global warming, as __9__well as cause changes that create impacts over the rest of the globe. __10__
Scientists say that something very serious is happening to the earth. It will begin to get __56__ in the following years. There will be major changes in ___57__ in the new century. Coastal waters will have a __58__ temperature. This will have a __59__ effect on agriculture. In northern areas, the __60__ season will be ten days longer by the year 2010. However, in warmer areas, it will be too dry. The __61__ of water could __62__ by eighty percent. This would __63__ a large decrease in agriculture production.
World temperature could __64__ two degrees centigrade by the year 2040. However, the increase could be three times as great in the Artic and Antarctic area. This could cause the __65__ sheets to melt and raise the __66__ of the oceans __67__ one to two meters. Many coastal cities would be __68__ water.
Why is this happening? There is too __69__ carbon dioxide in the air. __70__ oil, gas and coal burn, they create large amounts of carbon dioxide. This carbon dioxide lets __71__ enter the earth’s atmosphere and __72__ the earth. However, it doesn’t let as much heat __73__ the atmosphere and enter space. It’s like a blanket. The heat __74__ the sun can pass through the blanket to warm the earth. The heat __75__ there and can’t escape through the blanket again.
Scientists call this the green-house effect.
56. A warmer B colder C better D worse
In recent years a new farming revolution has begun, one that involves the 【21】______ of life at a fundamental level—the gene. The study of genetics has 【22】______ a new industry called biotechnology. As the name suggest, it 【23】______ biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to 【24】______ seeds that give a high yield, that 【25】______ diseases, drought and frost, and that reduce the need for 【26】______ chemicals. If such goals could be achieved, it would be most 【27】______ . But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain 【28】______ . A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, 【29】______ usually involves taking genes from one species and inserting them into another 【30】______ to transfer a desired Characteristic. This could mean, for example, selecting a gene which leads to the production of a chemical with antifreeze 【31】______ from an artic fish, and inserting it into a potato or strawberry to make it frost-resistant. 【32】______ , then, biotechnology allows humans to 【33】______ the genetic walls that separate species.
Like the green revolution, 【34】______ some call the gene revolution contributes to the problem of genetic uniformity—some say even more so 【35】______ geneticists can employ techniques such as cloning and 【36】______ culture(培养), processes that produce perfectly 【37】______ copies. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new 【38】______ , such as the effects that they may have on us and the environment. "We are flying blindly into a 【39】______ of agricultural biotechnology with high hopes, few constraints, and little idea of the potential 【40】______ ," said science writer Jeremy Rifkin.
【21】
A.manipulation
B.management
C.manufacture
D.maturity
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