题目内容
（请给出正确答案）
A、CO2 is diffused by active transport.
B、CO2 is diffused by facilitated transport.
C、difference of partial pressure of CO2 is higher than that of O2.
D、molecular weight of CO2 is higher than O2.
E、solubility of CO2 in water is higher than that of O2.
如搜索结果不匹配，请 联系老师 获取答案
更多“The reason that the diffusion …”相关的问题
第1题
A、solubility of CO2 in water is higher than that of O2.
B、CO2 is diffused by active transport.
C、CO2 is diffused by facilitated transport.
D、difference of partial pressure of CO2 is higher than that of O2.
E、molecular weight of CO2 is higher than O2.
第2题
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Joblessness is far more than an economic misfortune. It can be a psychological disaster for the unemployed and their families. It can cause illness, divide families and create a downward spiral of feelings of worthlessness and lack of self-esteem;
According to research done by M. Harvery Brenner, associate professor of health at Johns Hopkins University, every 1% increase in the unemployment rate translates into 37,000 deaths over the next 6 years, including over 20,000 deaths from heart attacks, 900 suicides and nearly 500 deaths from cirrhosis of the liver. In addition, Brenner estimates that 7,500 unemployed or their families will be admitted to prison after committing a crime or to a mental hospital. "The impact goes well beyond the individual who loses a job," said Brenner. "Stress caused by economic factors affects our national life at every level."
Men who have been socialized as the family breadwinner are especially hard hit by unemployment. They suffer greater depression and anxiety and have a higher possibility of psychotic behavior. than men who are employed. "Nine months seems to be a crucial point when hope and patience give out," said a leading psychologist. After that, "illness, suicide, alcoholism, divorce, and even crime grow at epidemic rate."
Left without a job, many workers feel they have nothing to look forward to. They miss their co-workers and the routine of going to work. For many, the sense of hopelessness grows worse every time they are rejected for a new job. When this happens often enough, the rejection unemployed workers feel may be exacerbated if some friends and neighbors avoid them as if they had a contagious disease.
According to the passage, which of the following is NOT true?
A．Joblessness is an economic misfortune.
B．Joblessness is a psychological disaster for the unemployed and their families.
C．Joblessness can cause the unemployed to commit suicide.
D．Joblessness is a contagious disease.
第3题
On April 18, 1990, the Chinese central government made the announcement of opening up and developing Shanghai Pudong. That was seen as a major strategy to turn Shanghai into one of world's largest economic, financial and trade centers and to regenerate the economy of the Yangtze River Delta and even the whole Yangtze River Valley.
The reconstruction of Pudong is a major strategic decision in carrying on the social and economic progress of China. It will lead the country in innovations of administrations, upgrading of industrial structures and expanding the practice of the opening-up policy. The past ten years have witnessed explosive economic growth in Pudong as well as an enormous change in the appearance of the city. Pudong New Area has become the landmark of Shanghai as one of the international economic centers in the 21st century.
As the tallest building in China, Jin Mao Tower is au intelligent building offering services for business, hotel, recreation, sightseeing and shopping. It is not only a new tourist attraction but also a window through which people from other parts of the world may get a better understanding of Shanghai and Pudong.
Pudong
Land area:【46】.
Population:【47】.
Past situation:【48】.
Time for fast development:【49】.
A window to see Shanghai:【50】.
第4题
Trade unions expressed anger that the announcement by two foreign-owned utilities, London Electricity and Eastern Electricity, came during the period immediately before Christmas. They noted that it arrived on the back of nearly.1,300 other job losses in this sector since early October.
Half of the 160,000 jobs in the electricity sector have gone since, privatization in 19881
More than 2,000 redundancies have also been announced recently by water companies, and more are expected from United Utilities as they, too, seek to meet tougher regulatory targets.
Not everyone in the industry is convinced that the current spate of job cuts in the utility sector is justified.
One leading industry executive, who wanted to remain anonymous, said: "I am very concerned that companies are using the regulators' price cut as an excuse for carrying out general cuts that they have wanted to do for some time. It is causing disquiet among utilities customers."
If regulatory approval is given London Electricity — a unit of Electricite de France — and Eastern Electricity, controlled by American conglomerate Texas Utilities, will form. a joint venture from April 1, 2000, which will run their respective electricity distribution businesses.
The companies will continue to compete on the supply and billing side of their operations but hope the new alliance will be able to win third party business, whether in electricity or other sectors such as gas.
The 800 job losses mean a quarter of the jobs affected by the joint venture will be lost within 18 months, and that the remaining positions will be dependant on the general level of business activity.
The two companies plan to achieve cost savings through fewer workers, having a single information system, smaller number of buildings and buying more in hulk.
Phil Turbeville, chief executive of Texas Utilities' TXS Europe subsidiary, said: "It is the responsible management response to the challenges of the tough price control while delivering further improvements in customer service."
He added that customers would benefit because lower costs meant more money available for new investment, and denied that the decision could have been made at a better time or would have been different if it had not been a foreign-owned group.
"Whether we told staff just before Christmas or just after it would have been the same. There is no good time to make redundancies. As you can see from what Scottish-based utilities have been doing, this is nothing to do with Paris or Texas. It is just prudent management," Mr. Turbeville said.
The phrase "gathered pace" in the first paragraph most probably refers to______.
A．speeded up
B．slowed down
C．continued
D．ended
第5题
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Noses have their advantages. They're cute, they're versatile, and they're small enough to be carried around. Which may be why the artificial odor detectors that engineers have been building since the 1950's to try to mimic the olfactory(嗅觉的) abilities of our built-in sensors have taken so long to find their way to the market--and then, in most cases, have flopped(失败).
But things are finally looking up for the electronic nose. Thanks to advances in chip technology and pattern-recognition techniques, increasingly tiny sniffers (嗅探器) are beginning to live up to their moniker (模仿者)- Today e-noses are being tested for everything from disease detection to disaster prevention, and lower-prices models are starting to come to the market including an $ 8,000 device called the Cyranose 320 being introduced this week by Cyrano Sciences of Pasadena, Calif.
Like our proboscises(长鼻子), e-noses are only as good as their sensors, and all of them operate on oiliness(油质)--rather than to the molecule itself. Working together, the receptors can generate unique principles remarkably similar to those of a real nose. Humans detect odors with up to 650 types of receptors found on cells high up in the nasal passages, somewhere between our eyebrows. How the nose works is still something of a mystery, but it is believed that each receptor responds to a subtle characteristic of a molecule that carries odor--its peculiar shape, say, or degree of "smell prints" of a wide variety of odors, which are then parceled off to the brain and stored.
In e-noses, chemical sensors replace the body's cellular receptors, and microprocessors substitute for the brain. "What limits these devices is how well the sensors are doing," explains Nathan Lewis, the Caltech chemist who helped invent the sensor technology licensed by Cyrano and who has since continued his research independently. He compares the power of e-noses to the resolution of computer monitors: "Are you seeing the world in eight shades of gray or in 16 million colors?"
It can be learned from the passage that ______.
A．the artificial noses are even better than the human noses
B．it has not taken long for the artificial noses to be introduced to the market
C．the attempts of the artificial noses to imitate the olfactory abilities have been largely unsuccessful
D．the artificial noses have their own advantages over the human noses
第6题
第7题
And wasn't it a great time to be a top manager, with productivity gains boosting the bottom line and igniting executive pay? While it was going on, venture capitalist L. John Doerr called the boom the "largest single legal creation of wealth in history."
Well, yes and no. With the recession apparently over, it's now possible to make a more realistic assessment of the entire business cycle of the 1990s: The sluggish recovery that started in March, 1991, the extraordinary boom, the tech bust, and the downturn of 2001. And guess what? A lot of things happened that defy the conventional beliefs about the decade.
Over this 10-year period, productivity rose at a 2.2% annual rate, roughly half a percentage point faster than in the 1980s—a significant gain. But the real stunner is this: The biggest winners from the faster productivity growth of the 1990s were workers, not investors. In many ways, the most tangible sign of worker gains in the 1990s was the home-buying boom. This revelation helps us understand why consumer spending stayed so strong in the recession—and why businesses may still struggle in the months ahead.
By contrast, the return on the stock market in the 1990s business cycle was actually lower than it was in the business cycle of the 1980s. Adjusted for inflation and including dividends, average annual returns on the S&P—500 index from March, 1991, to the end of 2001 were 11.1%, compared with 12.8% in the previous business cycle.
Overall, Business Week calculates that U.S. workers received 99% of the gains from faster productivity growth in the 1990s at nonfinancial corporations. Corporate profits did rise sharply, but much of that gain was fueled by lower interest rates rather than increased productivity.
Why did workers fare so well in the 1990s? The education level of many Americans made an impressive leap in the 1990s, putting them in a better position to qualify for the sorts of jobs that the New Economy created. Low unemployment rates drove up wages. And a torrent of foreign money coming into the U.S. created new jobs and financed productivity-enhancing equipment investment.
As it turns out, the original perceptions of who benefited most from the productivity gains of the 1990s was flipped on its head. Looking ahead, the economic pie is growing bigger all the time, but it's still up for grabs who will get the largest piece in the future. And in the end, that's the real lesson of the 1990s.
According to the writer, the original notion on the productivity gains of the 1990s turns out to be
A．somewhat superficial.
B．quite trustworthy.
C．rather misleading.
D．very illuminating.
第8题
A．Y
B．N
C．NG
第9题
A．The bus is less expensive than the train.
B．The train is faster than the bus.
C．The train is cheaper than the bus.
D．The bus is slower than the train.
为了保护您的账号安全，请在“上学吧”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
微信搜一搜
上学吧
微信搜一搜
上学吧
