请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
A. the tars in tobacco smoke are carcinogenic
B. diseases of the heart and blood vessels
C. a persistent coughing
D. human beings
E. the chances of a cure
F. prevent the disease from getting=further
In the United States and Canada, cancer ranks as the most fatal disease next to ______.
答案
更多“A. the tars in tobacco smoke are carcinogenic B. diseases of the heart and blood vessels C”相关的问题
第1题
根据短文回答 36～40 题。
Life in the Universe
Many scientists today are convinced that life exists elsewhere in the universe － life probably much like that on our own planet. They reason in the folio, wing way.
As far as astronomers (天文学家) can determine, the entire universe is built of the same matter. They have no reason to doubt that matter obeys the same laws in every part of the universe. Therefore, it is reasonable to guess that other stars, with their own planets, were born in the same way as our own solar system. What we know of life on earth suggests that life will arise wherever the proper conditions exist.
Life requires the right amount and kind of atmosphere. This .eliminates all those planets in the universe that are not about the same size and weight as the earth. A smaller planet would lose its atmosphere; a larger one would hold too much of it.
Life also requires a steady supply of heat and light. This eliminates double stars, or tars that flare up (闪耀) suddenly. Only single stab that are steady sources of heat and light like our sun would qualify.
Finally, life could evolve only if the planet is just the right distance from its sun. With a weaker sun than our own, the planet would have to be closer to it. With a stronger sun, it would have to be farther away.
If we suppose that every star in the universe has a family of planets, then how many planets might support life？ First, eliminate those stars that are not like our sun. Next, eliminate most of their planets; they are either too far from or too close to their suns. Then eliminate all those planets which are not the same size and weight as the earth. Finally, remember that the proper conditions do not necessarily mean that life actually does exist on a planet. It may not have begun yet, or it may have already died out.
This process of elimination seems to leave very few planets on which earthlike life might be found. However, even if life could exist on only one planet in a million, there are so many billions of planets that this would still leave a vast number on which life could exist.
第 36 题 Astronomers believe that matter in different parts of the universe（）
A．obeys different laws
B．obeys one common law
C．obeys the same laws
D．obeys no common law
第2题
Passage One
Questions 46 to 50 are based on the following passage.
“Sugar, alcohol and tobacco,” economist Adam Smith once wrote, “are commodities which are nowhere necessaries of life, which have become objects of almost universal consumption, and which are, therefore, extremely popular subjects of taxation.”
Two and a half centuries on, most countries impose some sort of tax on alcohol and tobacco. With surging obesity levels putting increasing strain on public health systems, governments around the world have begun to toy with the idea of taxing sugar as well.
Whether such taxes work is a matter of debate. A preliminary review of Mexico’s taxation found a fall in purchases of taxed drinks as well as a rise in sales of untaxed and healthier drinks. By contrast, a Danish tax on foods high in fats was abandoned a year after its introduction, amid claims that consumers were avoiding it by crossing the border to Germany to satisfy their desire for cheaper, fattier fare.
The food industry has, in general, been firmly opposed to such direct government action. Nonetheless, the renewed focus on waistlines means that industry groups are under pressure to demonstrate their products are healthy as well as tasty.
Over the past three decades, the industry has made some efforts to improve the quality of its offerings. For example, some drink manufacturers have cut the amount of sugar in their beverages.
Many of the reductions over the past 30 years have been achieved either by reducing the amount of sugar, salt or fat in a product, or by finding an alternative ingredient. More recently, however, some companies have been investing money in a more ambitious undertaking: learning how to adjust the fundamental make-up of the food they sell. For example, having salt on the outside, but none on the inside, reduces the salt content without changing the taste.
While reformulating recipes (配方)is one way to improve public health, it should be part of a multi-sided approach. The key is to remember that there is not just one solution. To deal with obesity, a mixture of approaches—including reformulation, taxation and adjusting portion sizes—will be needed. There is no silver bullet.
46.What did Adam Smith say about sugar, alcohol and tobacco？
A.They were profitable to manufacture.
B.They were in ever-increasing demand.
C.They were subject to taxation almost everywhere.
D.They were no longer considered necessities of life.
47.Why have many countries started to consider taxing sugar？A.They are under growing pressure to balance their national budgets.
B.They find it ever harder to cope with sugar-induced health problems.
C.The practice of taxing alcohol and tobacco has proved both popular and profitable.
D.The sugar industry is overtaking alcohol and tobacco business in generating profits.
48.What do we learn about Danish taxation on fat-rich foods？A.It did not work out as well as expected.
B.It gave rise to a lot of problems on the border.
C.It could not succeed without German cooperation.
D.It met with firm opposition from the food industry.
49.What is the more recent effort by food companies to make foods and drinks both healthy and tasty？A.Replacing sugar or salt with alternative ingredients.
B.Setting a limit on the amount of sugar or salt in their products.
C.Investing in research to find ways to adapt to consumers’ needs.
D.Adjusting the physical composition of their products.
50.What does the author mean by saying, at the end of the passage, “There is no silver bullet”(Line 4，Para.7)？
A.There is no single easy quick solution to the problem.
B.There is no hope of success without public cooperation.
C.There is no hurry in finding ways to solve the obesity problem.
D.There is no effective way to reduce people’s sugar consumption.
请帮忙给出每个问题的正确答案和分析，谢谢！
第3题
К предстоящему походу надо готовиться как следует, ведь в безграничной степи может случиться.
A．каждое
B．любое
C．всякое
第4题
Человек, который свои ошибки и исправляет их, никогда славы не теряет.
A．признает
B．узнает
C．познает
第5题
Человечество в новых источниках энергии, чтобы заменить непрерывно уменьшающие запасы нефти.
A．требуется
B．надобится
C．нуждается
第10题
What time will Cindy start her keynote address？
A．9:00 a. m.
B．9:30 a. m.
C．10:30 a. m.
D．11:00 a. m.
=( )
