题目内容

These twins are much ________ but they have different taste.

[　　]

A．alike
B．unlike
C．same
D．like

答案：A
解析：

题意：这对双胞胎非常相像，但是品味不同。alike作形容词时意为"相像的；相似的"。unlike"与……不像"；same"相同的"，之前通常加the；like前通常用very而不是much修饰。


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Ocean Acidification: 'Evil Twin' Threatens World's Oceans
The rise in human emissions of carbon dioxide is driving dangerous changes in the chemistry and ecosystems of the world's oceans, international marine（海洋的）scientists have warned. "Ocean conditions are already more extreme than those experienced by marine organisms and ecosystems for millions of years," says the latest issue of the journal Trends in Ecology and Evolution. "This emphasizes the urgent need to adopt policies that markedly reduce CO2 emissions."
Ocean acidification, which the researchers call the 'evil twin of global warming', is caused when the CO2 emitted by human activity, mainly burning fossil fuels, dissolves into the oceans. It is happening independently of, but in combination with, global warming. Evidence gathered by scientists over the last few years suggests that ocean acidification could represent an equal -- or perhaps even greater threat -- to the biology of our planet than global warming. More than 30% of the CO2 released from burning fossil fuels, cement production, deforestation and other human activities goes straight into the oceans, turning them gradually more acidic.
"The resulting acidification will impact many forms of sea life, especially organisms whose shells or skeletons are made from calcium carbonate（碳化钙）, like corals and shellfish. It may interfere with the reproduction of plankton species which are a vital part of the food web on which fish and all other sea life depend," he adds.
The scientists say there is now persuasive evidence that mass extinctions in past Earth history, like the "Great Dying" of 251 million years ago and another wipeout 55 million years ago, were accompanied by ocean acidification, which may have delivered the deathblow to many species that were unable to cope with it. "These past periods can serve as great lessons of what we can expect in the future, if we continue to push the acidity the ocean even further" said lead author, Dr. Carles Pelejero, from ICREA and the Marine Science Institute of CSIC in Barcelona, Spain. "Given the impacts we see in the fossil record, there is no question about the need to immediately reduce the rate at which we are emitting carbon dioxide in the atmosphere," he said further.
"Today, the surface waters of the oceans have already acidified by an average of 0.1 pH units from pre-industrial levels, and we are seeing signs of its impact even in the deep oceans," said co-author Dr. Eva Calvo, from the Marine Science Institute of CSIC in Spain. "Future acidification depends on how much CO2 humans emit from here on -- but by the year 2100 various projections indicate that the oceans will have acidified by a further 0.3 to 0.4 pH units, which is more than many organisms like corals can stand," Prof. Hoegh-Guldberg says.
"This will create conditions not seen on Earth for at least 40 million years."
"These changes are taking place at rates as much as 100 times faster than they ever have over the last tens of millions of years" Prof. Hoegh-Guldberg says. Besides directly impacting on the fishing industry and its contribution to the human food supply at a time when global food demand is doubling, a major die-off in the oceans would affect birds and many land species and change the biology of Earth as a whole profoundly, Prof. Hoegh-Guldberg adds.
67. What is the biggest cause of the ocean acidification according to the report?
A. the increase of carbon dioxide emission by human beings
B. The worsening of global warming
C. The disappearance of the world’s forests
D. The decrease of marine life
68. In what way according to the report does ocean acidification affect the majority of marine life?
A. It affects their reproduction          B. It destroys their food chain
C. It affects the growth of their young    D. destroys their habitats
69. Which of the following statements is NOT true about ocean acidification?
A. Ocean acidification has made ocean conditions most extreme in millions of years.
B. Ocean acidification may do more damage than global warming to human and plant life in the long run.
C. Ocean acidification is suspected of having caused mass extinctions of life in past Earth history.
D. The effects of ocean acidification are not now but will be felt in the foreseeable future.
70. From the report we can clearly feel that the situation with ocean acidification __________.
A. is quite optimistic                B. remains well under control
C. looks more than urgent            D. is already out of control 

The tea gardens in Sri Lanka are actually large estates(种植园). The best tea usually comes from plants grown on high grounds, the cool hilltops with rows and rows of tea plants. The plants are about one metre apart. The plant is often pruned so that it remains only 60 to 90 centimetres high. Pruning is important because it encourages the growth of tender hoots, or young leaves. It is from these shoots that the best in got.
Practically all the tea pickers are women. The estates like to employ women pickers because they are more careful. Their thin fingers can easily remove the twin leaves and new shoots from the plant, which are the parts used for processing(加工)tea. The pickers carry large baskets into which they throw their pickings. A skilled worker can harvest between 9 to 14 kilogrammes of tea leaves a day. Usually new shoots can be picked from the plants about every ten or fifteen days.
Processing tea shoots into the familiar dry tea leaves requires great care and skill. There are various methods of processing depending on the type of tea required. For black tea, the young green leaves are first spread out on shelves to dry. This process removes much of its water and the leaves become soft. After this, the leaves are passed through heavy rollers. This operation will press the leaves for juices which give the tea both its colour and taste. Then the leaves are spread out on floors and left to ferment(发酵)under wet conditions. Fermentation develops the rich taste of black tea. The fermented leaves are then dried with a hot­air blower until they become rolled­up black leaves. The final step is to sort and grade them before the black tea is ready for sale to countries all over the world.
【小题1】In the first paragraph, the word“pruning”means______.

A．regular cutting of the plants.B．frequent watering
C．regular use of chemicalsD．growing the plants high in the mountain
【小题2】One of the reasons why women are employed to do the picking is that________.
A．they work harder than men do in picking
B．they can throw their picking more easily into the baskets
C．their fingers fit them better for the job
D．they can move easily find the twin leaves
【小题3】How many processing steps are mentioned in the last paragraph?
A．Three.　B．Four.C．Five.　D．Six.
【小题4】What's the writer's purpose in writing the passage?
A．To introduce various methods of tea processing.
B．To persuade readers to buy tea from Sri Lanka.
C．To tell a story that had happened in the tea gardens.
D．To inform readers of tea growing, picking and processing.


D
At age 61, identical twins Jeanne and Susan no longer look exactly alike. Susan smoked for many years and is an admitted sun worshipper, whose habits Jeanne does not share. A new study of twins suggests you can blame those coarse(粗糙的)wrinkles, brown or pink spots on too much time in the sun, smoking, and being overweight.
Because twins share genes, but may have different exposures to environmental factors studying twins allows an “opportunity to control for genetic susceptibility(易受影响性),” Dr. Elma D. Baron, at Case Western Reserve School of Medicine in Cleveland, Ohio, and his colleagues explain in the latest issue of Archives of Dermatology.
Their analysis of environmental skin-damaging factors in 65 pairs of twins hints that skin aging is related more to environment and lifestyle than genetic factors.
But when it comes to skin cancer, the researchers say their findings support previous reports that both environment and genes affect skin cancer risk.
Baron’s team examined facial skin of 130 twins, 18 to 77 years old, who lived mostly in the northem Midwest and Eastern regions of the US, who were attending the Twins Days Festival in Ohio in August 2002. At this time, each of the twins also separately reported how their skin burned or tanned(晒黑)without sunscreen, their weight, and their history of skin cancer, smoking, and alcohol drinking. The study group consisted of 52 fraternal(异卵双生)and 10 identical twin pairs, plus 3 pairs who were unsure of their twin status.
From these data, the researchers noted strong ties, outside of twin status, between smoking, older age, and being overweight, and having facial skin with evidence of environmental damage. By contrast, sunscreen use and drinking alcohol appeared related to less skin damage.
Baron and his colleagues say the current findings, which highlight ties between facial aging and potentially avoidable environmental factors—such as smoking, being overweight, and unprotected overexposure to the sun’s damaging rays—may help motivate people to minimize these risky behaviors.
67．Which of the following is true according to the passage?
A．Jeanne and Susan share all the habits including smoking.
B．Skin aging is related more to environment and lifestyle than genetic factors.
C．Only identical twins can take part in the research.
D．Sunscreen use cannot help people have less skin damage.
68．Why did Baron’s team do the research on twins?
A．Twins are more likely to suffer from skin cancer.
B．It may guarantee the research is not influenced by genetic factors.
C．It gives others an opportunity to control twins’ genes.
D．It helps find twins are exposed to different environments.
69．What can you infer from the last paragraph?
A．This research makes people aware of dangerous lifestyles.
B．The environmental factors are unavoidable.
C．Being exposed to the sun is absolutely damaging.
D．There is little relationship between skin aging and environment.
70．The passage is mainly concerned with___________
A．skin cancer and environment
B．identical twins research
C．aging skin and environmental factors
D．genes and lifestyles

A healthy dose of sunshine may be the secret to staying young, British scientists have disclosed.
Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the ageing process and protect against heart disease, according to the study.
Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA．As people get older, their telomeres get shorter and they are easy to have illnesses.
But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.
The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.
Lead researcher Dr Brent Richards said: "These results are exciting because they prove for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D．
"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."
He said further studies are required to confirm the findings.
Professor Tim Spector, head of KCL's twin research unit, and a co-author of the report, added: "Although it might sound absurd(荒谬的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."
Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.
【小题1】What’s the best title of this passage?

A．Sunshine helps to keep you young.
B．Vitamin D has a protective effect on many diseases.
C．Telomeres - a biological marker of ageing.
D．People have found the secret to having a long life.
【小题2】How can people get Vitamin D?
A.through water.       B. through sunshine.
C.through food.        D.both B and C.
【小题3】Which of the following is not true according to the passage?
A．women with high levels of vitamin D shows a sign of being biologically younger and healthier.
B．vitamin D has a protective effect on many ageing related diseases.
C．too much sunshine may increase our risk of skin cancer.
D．It has been proved that sunshine helps to keep you young.

Here is your best chance to travel around the UK in 2012: More than 200 B&Bs (bed & breakfast) across England, Scotland, Wales and Northern Ireland are selected to offer you amazing services for your stay at their lowest prices! Don’t miss it. Just collect the vouchers（活动券） in our B&B Daily printed from 01/ 04/ 2012 to 07/ 04/ 2012 and book the stays for your travel following the terms and conditions below:

● The offer includes a room for the night and a breakfast the next morning.

● The offer is of two kinds: £20 per room, per night, valid（有效的） during stay period of 2/ 04/ 2012--- 31/ 05/ 2012 and then again 01/ 08/ 2012--- 31/ 10/ 2012; £35 per room, per night, valid during stay period of 01/ 06/ 2012 --- 31/ 08/ 2012.

● The offer is valid for a basic twin or double room only.

● The stay must be booked directly with the chosen B&Bs before 28/ 04/ 2012.

● If voucher holders book either the £20 or £35 per room per night, any additional services such as

lunch, evening meal or activities may require an extra charge. But these are not required in order to take up the offer. Please check directly with your chosen B&Bs to see what extra services are available.

● Vouchers must be presented on arrival. If no vouchers are presented, the B&Bs may reserve（保留） the right to charge at full price for every night of stay.

● Vouchers may not be used together with any other offer.

● The voucher holders must pay for the stay in full at the time of booking. Additional £10 may be paid to confirm（确认） the booking and will be returned on arrival.

● The B&Bs reserve the right to refuse voucher holders’ bookings for people under the age of 18.

1.The voucher can be used for a stay at the chosen B&B on           .

A．09/ 01/ 2012

B．04/ 02/ 2012

C．01/ 03/ 2012

D．28/ 04/ 2012

2.How much should be paid for a two-night stay in October 2012 at a chosen B&B?

A．£ 70.

B．£40.

C．£35.

D．£30.

3.By taking up the offer, the voucher holders can choose to           .

A．book either a basic twin or double room at the chosen B&Bs

B．have lunch or evening meal without paying extra money

C．use the B&B offer together with other offers

D．book the stays through B&B Daily

 

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