相同项单选集
相同项单选集
Transportation Decision Transportation decision consists of the following parts: 1.Selection of the mode is determined by the consideration of distance,cargo weights,linkage,timing and other requirements.Generally speaking,rail has high fixed cost and the relatively low variable cost.It can move heavy,large quantity of cargo in the long distance.But,rail is disadvantaged because of the longer transit time and less frequent service than motor. Motor carriers such as truck companies offer door-to-door service,that is,the cargo can be shipped from the shipper＇swarehouse to the consignee＇s.Trucking fixed cost is the lowest of any carrier,because the equipment is fairly cheap and the motor carriers do not have to invest in the roads on which they run their operations.However,their variable costs are very high.Its expenses include two major components:firstly,the pick-up and delivery costs;secondly,there are gas or fuel costs,labor expenses and toll roads fees to be paid to highway and toll road operators Therefore,motor transport is good for cargo with small quantity to be shipped within short distances. Water is the predominant choice of transportation as it has the capacity to take greatest quantity,travel longest distance with lowest cost.Transport by sea accounts for 80% of in-ternational trade.The major expenses for water are expenses associated with investment and maintenance of the ships and terminals.For example,a 100000-ton container ship costs US$ 200 million.Terminal associated costs include harbor fees and the cost for loading and unloading the goods. Transport by air has the highest cost but it is fast with the lowest ratio of loss and dam-age.If you need to deliver an urgent order,there is little choice but by air. 2.Transport service provider is selected for its experiences,equipment,services and prices.Competitive in the transport industry usually drives the prices down and motivates for better services.A company also chooses its transport service provider because of its long-standing business relationship with certain shipping companies. 3.The alternative routing and scheduling is specific for motor only because railway and water have strict route and timetable.Motor has special advantage in terms of flexibility.It has the ability to load goods at greater frequency,travel through different routes and making deliveries to different loca-tions.Questions:
For heavy and long distance cargo with low cost,which of the following is the pre-ferred mode for transportation?( )
A:Trucks. B:Water. C:Aircraft. D:Broken down in small bulks and deliver by air.
Many Benefit from Cancer Organization
1. Do you know a child who survived leukemia? Do you have a mother, sister or aunt whose breast cancer was found early thanks to a mammogram? Do you have a friend or coworker who quit smoking to reduce their risk of lung cancer? Each of these individuals benefited from the American Cancer Society’s research program.
2. Each day scientists supported by the American Cancer Society work to find breakthroughs that will take us one step closer to a cure.1 The American Cancer Society has long recognized that research holds the ultimate answers to the prevention, diagnosis and treatment of cancer.2
3. As the largest source of nonprofit cancer research funds in the United States, the American Cancer Society devotes over $100 million each year to research. Since 1946，they’ve invested more than $2.4 billion in research. The investment has paid rich dividends3 ：In 1946，only one in four cancer patients was alive five years after diagnosis; today 60 percent live longer than five years.
4. Investigators and health professionals in universities, research institutes and hospitals throughout the country receive grants from the American Cancer Society. Of the more than 1,300 new applications received each year, only 11 percent can be funded. If the American Cancer Society had more money available for research funding, nearly 200 more applications considered outstanding could be funded each year:
5. You can help fund more of these applications by participating in the American Cancer Society Relay for Life, a team event to fight cancer. More funding means more cancer breakthroughs and more lives being saved. To learn more, call Donna Hood, chair with the Neosho Relay for Life of the American Cancer Society at 451–4880.
词汇：
leukemia /lʊ"kimɪə/ n.白血病
breast /brest/ n.乳房;乳腺
mammogram /"mæməgræm/ n.乳腺X光照片
relay /"riːleɪ/ n.接力
nonprofit /,nɑn"prɑfɪt/ adj.非营利的
dividend /"dɪvɪdend/ n.回报,效益
coworker /"kəu,wə:kə/n. 一起工作的人,同事
注释：
1.Each day scientists supported by the American Cancer Society work to find breakthroughs that will take us one step closer to a cure.每天,得到美国癌症协会资助的科学家们都在为更进一步接近有效疗法而不停地工作。
2.The American Cancer Society has long recognized that research holds the ultimate answers to the prevention, diagnosis and treatment of cancer.美国癌症协会很久以来便认识到,预防、诊断与治疗癌症的最终答案取决于科研。
3.has paid rich dividends:产生了丰厚的效益A lack of fundingB many cancer patients
C more lives being saved
D more than five years
E the ultimate answers
F more fundingThe American Cancer Society’s research program has benefited __________.
A:A B:B C:C D:D E:E F:F
Azeri Hills Hold Secret of Long Life
You can see for kilometers from the mountains where Allahverdi Ibadov herds his small flock of sheep amid a sea of yellow, red, and purple wildflowers. The view from Amburdere in southern Azerbaijantoward the Iranian border is spectacular, but Mr. Ibadov barely gives it a second glance.
Why should he? He’s been coming here nearly every day for 100 years.
According to his carefully preserved passport, Mr. Ibadov, whose birth was not registered until he was a toddler, is at least 105 years old. His wife, who died two years ago, was even older. They are among the dozens of people in this beautiful, isolated region who live extraordinarily long lives.
Mr. Ibadov’s eldest son has just turned 70. He lost count long ago of how many grandchildren he has.1 “I’m an old man now I look after the sheep, and I prepare the wood for winter. I still have something to do. “
A lifetime of toil, it seems, takes very few people to an early grave in this region. Scientists admit there appears to be something in the Azeri mountains that gives local people a longer, healthier life than most.
Miri Ismailov’s family in the tinyvillageofTatoniare convinced that they know what it is. Mr. Ismailov is 110, his great-great-grandson is four. They share one proud boast: Neither has been to a doctor. “There are hundreds of herbs on the mountain, and we use them all in our cooking and for medicines”; explained Mr. Ismailov’s daughter,Elmira. “We know exactly what they can do. We are our own doctors.，’
There is one herb for high blood pressure，another for kidney stones，and a third for a hacking cough. They are carefully collected from the slopes surrounding the village. Experts from the Azerbaijan Academy of Science believe the herbs may be part of the answer. They have been studying longevity in this region for years. It began as a rare joint Soviet-American project in the 1980s，but these studies are not being funded any more.
Azeri scientists have isolated a type of saffron unique to the southern mountains as one thing that seems to increase longevity. Another plant, made into a paste, dramatically increases the amount of milk that animals are able to produce. “Now we have to examine these plants clinically to find out which substances have this effect,” said Chingiz Gassimov, a scientist at the academy.
The theory that local people have also developed a genetic predisposition to long life has been strengthened by the study of a group of Russian emigres whose ancestors were exiled to the Caucasus 200 years ago.2 The Russians’ life span is much shorter than that of the indigenous mountain folk — though it is appreciably longer than that of their ancestors left behind in the Russian heartland.
“Over the decades，I believe local conditions have begun to have a positive effect on the new arrivals” , Professor Gassimov said. “It’s been slowly transferred down the generations.”
But Mr. Ismailov, gripping his stout wooden cane, has been around for too long to get overexcited. “There’s no secret,” he shrugged dismissively. “I look after the cattle and I eat well. Life goes on.”
词汇：
herd /hɜ:d/ vt.放牧
boast /bəʊst/ vt.以有……而自豪
longevity / lɑnˈdʒɛvɪti/ n.长寿
Caucasus /ˈkɔ:kəsəs/ n.高加索
Dismissively 轻蔑地
spectacular / spekˈtækjələadj. / adj.壮观的
hacking cough 干咳
saffron /ˈsæfr(ə)n/ n.藏红花
indigenous /ɪnˈdɪdʒinəs/ adj.本土的
注释：
Miri Ismailov has never been to a doctor but his great-great-grandson has
A:Right B:Wrong C:Not mentioned
Clone Farm
Factory farming could soon enter a new era of mass production. Companies in the USare developing the technology needed to "clone" chickens on a massive scale1. Once a chicken with desirable traits has been bred or genetically engineered2, tens of thousands of eggs, which will hatch into identical copies3 , could roll off the production lines every hour. Billions of clones could be produced each year to supply chicken farms with birds that all grow at the same rate, have the same amount of meat and taste the same.
This, at least, is the vision of theUS"s National Institute of Science and Technology, which has given Origen Therapeutics of Burlingame, California, and Embrex of North Carolina $4.7 million to help fund research4. The prospect has alarmed animal welfare groups, who fear it could increase the suffering of farm birds.
That"s unlikely to put off5 the poultry industry, however, which wants disease-resistant birds that grow faster on less food. "Producers would like the same meat quantity but to use reduced inputs to get there," says Mike Fitzgerald of Origen. To meet this demand, Origen aims to "create an animal that is effectively a clone", he says. Normal cloning doesn"t work in birds because eggs can"t be removed and implanted. Instead, the company is trying to bulk-grow6, embryonic stem cells7 taken from fertilized eggs as soon as they"re laid. "The trick is to culture8 the cells without them starting to distinguish, so they remain pluripotent," says Fitzgerald.
Using a long-established technique, these donor cells will then be injected into the embryo of a freshly laid, fertilized recipient egg9, forming a chick that is a "chimera". Strictly speaking a chimera isn"t a clone, because it contains cells from both donor and recipient. But Fitzgerald says it will be enough if, say, 95 percent of a chicken"s body develops from donor cells. "In the poultry world, it doesn"t matter if it"s not 100 percent," he says.
Another challenge for Origen is to scale up10 production. To do this, it has teamed up with11 Embrex, which produces machines that can inject vaccines into up to 50,000 eggs12 an hour. Embrex is now trying to modify the machines to locate the embryo and inject the cells into precisely the right spot without killing it.
In future, Origen imagines freezing stem cells from different strains of chicken13. If orders come in for a particular strain, millions of eggs could be produced in months or even weeks. At present, maintaining all the varieties the market might call for is too expensive for breeders, and k takes years to breed enough chickens to produce the billions of eggs that farmers need.
词汇:
Clone/ kləʊn /n. & v.克隆，无性繁殖
embryo / ˈembriəʊ /n.胚胎
implant / "ɪmplɑ:nt /v.植入；移植
chimera / kaɪˈmɪərə /n.嵌合体
embryonic / ˌembriˈɒnɪk /adj.胚胎的
fertilise / "fɜ:tɪlaɪz /v.使受精
pluripotent / plʊə"rɪpətənt /adj.多能的
vaccine / "væksi:n /n.疫苗
注释：
1. on a massive scale:大规模
2. genetically engineered：经过基因改造。genetical engineering：遗传工程
3. hatch into identical copies：孵出如出一辙的（小）鸡
4. help fund research： 资助研究。fund用作动词，research是它的宾语。
5. put off：意为 “discourage”（使……气馁）。
6. bulk-grow： 大量繁殖
7. stem cell：干细胞
8. culture：动词，意思是：培育。
9. a freshly laid, fertilized recipient egg:新产下的；已受精的；要接受细胞植入的鸡蛋
10. scale up： 提高，按比例增加。
11. team up with：与 合作。
12. up to 50,000 eggs：多达 5 万只鸡蛋。
13. different strains of chicken：不同品种的鸡。
Which institution has offered USD 4.7 million to fund the research?
A:The US"s NationalInstituteofScienceand Technology B:Origen Therapeutics of Burlingame,California C:Embrex of North Carolina D:Animal welfare groups
She ought (to) (stopping) work; She (has a headache )because she has been reading (too) long.
A:to B:stopping C:has a headache D:too
She ought (to) (stopping) work; She (has a headache )because she has been reading (too) long.
A:to B:stopping C:has a headache D:too
She ought (to) (stopping) work; She (has a headache )because she has been reading (too) long.
A:to B:stopping C:has a headache D:too
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