In stating look over in Paragraph 3, the author means _____.A.look from aboveB.investigate
In stating look over in Paragraph 3, the author means _____.
A.look from above
B.investigate
C.look through
D.check
In stating look over in Paragraph 3, the author means _____.
A.look from above
B.investigate
C.look through
D.check
A.do well
B.reflect light
C.look happy
D.produce light
A、Childe Harold's Pilgrimage
B、Don Juan
C、The Prisoner of Chillon
D、Manfred
A.assume
B.perceive
C.comprehend
D.observe
A.They usually sit in the front of the class and write pages of notes a day.
B.They talk to someone only at the end of class when the lecture is over.
C.They take out all their books and study for the classes that they have the next day.
D.They rarely take part in something of a social lif
Air Pollution and Acid Rain The increasing variety and prevalence of pollution presents the world with many extremely daunting problems, air pollution in particular ranks among the most serious. In the following text, air pollution and acid rain caused by automobiles will be discussed. Certain solutions to the problem will be provided in the conclusion. It is widely known that cars are the main cause of air pollution in cities, accounting for 60% to 90% of all air pollution. This will get worse as the number of cars increases in urban areas. How do cars cause air pollution? First we must examine how a car works. Theres a mixture of petrol in the cars internal combustion engine which create the force for the automobile to move. Unfortunately, in this process there are some poisonous chemicals which remain; these poisonous chemicals mainly come out of the car through the exhaust, its not just what comes out of the car exhaust that is dangerous, the brake system also causes pollution. Brakes on cars release asbestos, it is a highly dangerous substance and it can kill humans. Also, the tires themselves give off small rubber particles which are not very healthy. Acid rain caused by air pollution has strongly influenced peoples lives. It is almost impossible to describe the mathematical relationship between what goes up as pollutant emissions and what comes down as acid rain. However, we do know the primary source of acid rain is the pollution released by power plants. The pollutants combine with moisture in the atmosphere and then fall as an acid rain. Germans often call it royal water, because it can break down gold. The royal water falls in the form. of rain or snow on the German Black Forest and attacks the soil. Microorganisms within the soil perish and metals harmful to trees like aluminum leak into the ground. At the same time, the acid rain attacks the trees leaves and dissolves their waxy coating. The leaves then shrivel and die. About one in every ten trees in the Black Forest is a fir. 76% of all firs in the Black Forest are dying. 41% of all spruce are diseased, 43% of all pine are diseased, 26% of beech trees and 16% of all other trees are dying. Environmental groups like Green Peace campaign around Europe trying to stop the causes of acid rain. We need to find solutions to this problem. First, we should try and discourage the overuse of cars. We could do this by raising taxes on petrol or by making cars more expensive. Second, we can encourage alternative methods of transportation. For example, in Shanghai recently, a subway has been built underground, which takes some of the pressure off the roads. Some people would rather use the underground than drive their cars. Next, we could develop and use cleaner fuels instead of petrol. For example, we might use natural gas in the future or we might experiment with battery powered cars. Finally, the actual by-products of vehicle emissions must be managed. (A)Scientists and engineers are now trying to use mechanical means for reducing the amount of chemicals that are emitted from cars exhaust pipes. (B)Germany is now leading the way in attacking this part of the problem. (C)In order to clean up motor vehicle emissions, all new cars in Germany must now meet new emission standards and be fitted with a device called a catalytic converter. (D)This is a device that is fixed over the exhaust and controls the carbon monoxide and other dangerous chemicals that cars give off. Like Germany, the United States also introduced strict clean air-controls on motor vehicle emissions in the mid-70s as part of their efforts to reduce acid rain. Its unlikely that any one of these solutions will work on its own. It will take a combination of all four of these solutions to help solve the air pollution problem.
The word daunting in Paragraph 1 is closest in meaning to ______.
A.solvable
B.frightening
C.promising
D.intrepid
A.Square A.
B.Square B.
C.Square C.
D.Square D.
A.entrepreneurs increased output by using an extended outwork system
B.entrepreneurs used technological improvements to increase output
C.rural workers responded to "shoe bosses"
D.changes in the outwork system improved the quality of shoes
A.The groups can patrol their borders constantly.
B.The members of each group can spend time looking for food.
C.Food can be shared among the different groups.
D.Fighting between different groups can increas
A.By showing people honest representations of the news.
B.By making the stories shorter and easier to read.
C.By giving a hint that photographs were more interesting than artwork.
D.By making newspapers more affordabl
An introductory sentence to a brief summary of the passage is given below. Complete the summary by adding the THREE answer choices that express the most important ideas in the passage. Some answer choices do not belong in the summary because they express ideas that are not given in the passage or are minor ideas in the passage. This question is worth 2 points. Natural selection is the name given by Darwin to the process whereby new species evolve over time as individuals with useful traits survive and reproduce, passing those traits on to new generations. ____________ ____________ ____________ Answer Choices 1. Darwin believed that natural selection favored organisms that had traits that could help them find food and survive predator attacks and environmental pressures. 2. Darwin explained advanced traits that did not seem to affect an organisms survival as being characteristics useful in finding a mate. 3. Moths near industrial centers evolve dark coloration when the trees in which they live are blackened by pollution from nearby factories. 4. Recently, scientists have expanded the idea of natural selection to include traits that benefit the species as a group, even when those traits seem harmful to the particular individuals who possess them. 5. The peacocks colorful tail feathers are meant to attract peahens, which view the bright colors involved in the display as a sign of the males good health. 6. Religious groups opposition to evolutionism has led some schools to reconsider teaching it, even though it is an established scientific theory with much evidence to prove it.
Wegener based the theory of Continental Drift on all of the following observations EXCEPT
A.opposition of climates.
B.fit of continents.
C.similarities of living animals.
D.similarities in rocks and ic
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