单选题We shall take the treasure away to a safe place. A. clean B. pretty C. distant D. secure
单选题These goods are {{U}}essentially{{/U}} for export, though a few of them may be sold on the home market.
单选题The Constitution's {{U}}vague{{/U}} nature has given it the flexibility to be adapted when circumstances change.
单选题It took me exactly a week to
complete
the work.
单选题Guests were
scared
when the bomb explored.
单选题For young children getting dresses is a
complicated
business.
单选题Group Exercise" Boosts Happiness" Exercising together appears to increase the level of the feel - good endorphin hormones naturally released during physical exertion, a study suggests. A team from Oxford University carried out tests on 12 rowers after a vigorous workout in a virtual boat. Those who trained alone withstood less pain—a key measure of endorphins—than those who exercised together. Row your boat It has long been known that phyrsical exertion releases endorphins and that these are responsible for the sometimes euphoric sensations experienced after exercising. They have a protective effect against pain. But researchers from Oxford University's Institute of Cognitive and Evolutionary Anthropology found this response was beightened by the synergistic effect of rowing together. After 45 minutes of either rowing separately or in a team of six, the researchers measured their pain threshold by how long they could tolerate an inflated blood pressure cuff on the arm. Exercise increased both groups' ability to tolerate pain, but the difference was significantly more pronounced among the team rowers. This, they said, was a measure of an increased endorphin release. As well as potentially improving performance in sport, the researchers speculated that this endorphin release may be the mechanism that underpins the sense of communal belonging that emerges from activities such as religious rituals, dancing or laughing. "The results suggest that endorphin release is significantly greater in group than in individual training even when power output, or physical exertion, remains constant," said lead author Emma Cohen, "The exact features of group activity that generate this effect are unknown, but this study contributes to a growing body of evidence suggesting that synchronised, coordinated physical activity may be responsible. " Carole Seheuh, a sport and exercise psychologist from the British Psychological Society, said "The findings were entirely credible. Rowing is a sport which requires real team work and endorphins could well foster that process. But more generally we know from experience that exercising in groups is good for people, it's motivational, it's social. Groups sessions really do work. /
单选题Gardner thinks that his theory has a ________ .
单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。
{{B}}Maasai Mara{{/B}} Maasai Mara is a part
of the southwestern tourist circuit and the most popular and visited game
reserve in Kenya. The annual wildebeest migration to Maasai Mara is the world's
greatest wildlife spectacle, something not to be missed especially if you're
visiting Kenya between August and October. Millions of wildebeests, zebras and
gazelles from the Serengeti plains migrate across the Tanzania border and the
Mara River to reach Maasai Mara grazing fields from late June. The game reserve
abounds with bird—life since close to about 452-odd species have been
recorded. Maasai Mara has a good range of accommodation from
five-star lodges to luxury-tended camps. To keep the tempo of your adventure
going, Spartan tented camps and campsites within the game reserve are the best
choice. Game walks and night game runs were tests to our bravery! Night falls
quickly in the tropics and as the temperature drops, the campfire becomes the
focus of your tour. You can keep count of the sightings of mammals, reptiles and
birds. Insects and hyenas provide the background music while the night sky is a
symphony of stars. Lake Naivasha, Magadi, Victoria and
Elementaita are accessible from the Maasai Mara Game reserve. Kenyan's priceless
treasury of wildlife owes its existence to contrasts in the country's terrain,
which ranges from rugged snow covered peaks of Mount Kenya, the Highland, the
Savannah, the Great Rift Valley and its lakes as well as the sun-burnt sands of
the coast. Each of these geographical regions is home to different types of
wildlife that are unique to each area. Kenya has an amazing
wealth of bird life. We could get to see many bird species in Kenya. This again
is due to its variety of habitats. Many migratory birds are also spotted here.
According to our guide, more than six million birds migrate to Kenya during the
Northern Hemisphere winter. These migrants along with the local species of birds
make Kenya an ornithological paradise.
单选题It hard for the young people to imagine what severe conditions their parents once lived under.A. sincereB. hardC. strictD. tight
单选题The powers of the European Commission to {{U}}regulate{{/U}} competition
are increasing.
A. fight
B. abolish
C. control
D. remove
单选题
第二篇 Health or Profit
Although there is no direct evidence that salt is the cause of high blood
pressure ar "hypertension", there are studies which indicate that reducing salt
intake lowers blood pressure. Some scientists are also concerned that excessive
use of salt may cause asthma and kidney disease. Therefore most doctors would
welcome a decision by food manufacturers to decrease the amount of salt in
food. Many food manufacturers, however, are reluctant to reduce
tile amount of salt. Salt is an important flavor enhancer and preservative.
British Salt points out that salt is an essential nutrient and regular intake is
required to maintain bodily functions. Moreover, according to British Salt,
there are greater risk factors in hypertension, such as obesity (肥胖), lack of
exercise, alcohol intake and smoking. Another reason why food producers are not
keen on lowering the amount of salt is probably that they fear that less salt
will mean lower sales. Not only will the sale of processed food containing salt
decease but also the sale of soft drinks. A recent study,
published in The Lancet of April 1999, proves that if manufacturers cut the salt
content of food it will not necessarily affect the taste of the product. Anthony
Rodgers and Bruce Neal conducted a study to examine the difference in taste
between bread with standard and reduced salt content. Three types of whole-meal
bread were prepared, identical in all respects except for salt content. One loaf
contained the standard quantity, one loaf 10% reduced and one 20% reduced. Sixty
participants, who did not know the salt content were asked to rate the taste on
a scale from zero to ten. They also had to guess which loaf contained the
standard, 10% reduced and 20% reduced quantity. Of the 180 guesses of salt
content, 63 were correct, which is not different from what would be expected by
chance. The study by Rodgers and Neal indicates that small
reductions in salt content will not necessarily affect sales. If food
manufacturers decide to diminish the amount of salt in food, blood pressure of
the entire population will shift downwards, which may result in considerable
health benefits. One of Britain's largest supermarkets, Asda, has already
decided to decrease the amount of salt in its products. The Asda products will
contain up to 25% less salt.
单选题Jane said that she couldn't tolerate the long hours.A. endB. takeC. standD. last
单选题Medical facilities are being upgraded.A. renewedB. repairedC. improvedD. increased
单选题Many classical music lovers feel disoriented when they listen to modern atonal music.
单选题The boys
broke
into excited cheering.
单选题She gave up her job and started writing poetry.A. lostB. abandonedC. tookD. created
单选题
Dining Custom Every
land has its own dining custom, and the United States is no exception. Americans
feel that the first rule of being a polite guest is to be on time. If a person
is invited to dinner at 6:30, the hostess expects him to be there at 6:30 or not
more than a few minutes after. Because she usually does her own cooking, she
times the meal so that the coffee and meat will be at their best at the time she
asks the guest to come. If he is late, the food will not be so good, and the
hostess will be disappointed. When the guest can not come on time, he calls his
host or hostess on the telephone, gives the reason, and tells at what time he
thinks he can come. As guests continue to arrive, the men in
the group stand when a woman enters and remain standing until she finds a chair.
A man always rises when he is being introduced to a woman. A woman does not rise
when she is being introduced either to a man or a woman unless the woman is much
older. When the guests sit down at a dinner table, it is
customary for the men to help the ladies by pushing their chairs under
them. Even an American may be confused by the number of knives,
forks and spoons besides his plate when he sits down to a formal dinner. The
rule is simple, however: use them in the order in which they lie, beginning from
the outside. Or watch the hostess and do what she does. The small fork on the
outside on the left is for salad, which is often served with the soup. The spoon
on the outside at the right is for soup, and so on. Sometimes there is a
separate little knife, called a butter spreader, on a small bread- and-butter
plate at the left. As the bread is passed, each guest puts his piece on the
bread-and-butter plate.
单选题At the meeting, Smith argued {{U}}mightily{{/U}} in favor of the proposal.
A. severely
B. warmly
C. forcefully
D. heavily
单选题
{{B}}Dark Forces Dominate
Universe{{/B}} The Earth, moon, sun and all visible stars in the
sky make up less than one per cent of the universe. Almost all the rest is dark
matter and dark energy, unknown{{U}} (1) {{/U}}that puzzle
astronomers. Observations in recent years have changed the basic
understanding of how the universe evolved and have emphasized for astronomers
how little is known{{U}} (2) {{/U}}the major forces and substances that
shaped our world: Astronomers now know that luminous
matter-stars, planets and hot gas — {{U}}(3) {{/U}}only about0.4 per
cent of the universe. Non. luminous components, such as black holes and
intergalactic gas, make up 3.6 per cent. The rest is either dark matter, about
23 per cent, or dark energy, about 73 per cent. Dark matter,
sometimes called "cold dark matter", has been known for some{{U}} (4)
{{/U}}. Only recently have researchers come to understand the pivotal role
it{{U}} (5) {{/U}}in the formation of stars, planets and even
people. "We owe our very existence to dark matter", said
physicist Paul Steinhardt and a co-author of a review on dark matter which
appeared not long{{U}} (6) {{/U}}in the journal Science.
Steinhardt said it is believed that following the Big Bang, the
theoretical{{U}} (7) {{/U}}of the universe, dark matter caused particles
to clump together. That set up the gravitation processes that led to the
formation of stars and galaxies. Those stars, in turn, created the basic
chemicals, such as carbon and iron, that were{{U}} (8) {{/U}}to the
evolution of life. "Dark matter dominated the formation of
structure in the early universe." Steinhardt said. "For the first few billion
years dark matter contained{{U}} (9) {{/U}}of the mass of the universe.
You can think of ordinary matter as a froth of an Ocean of dark matter. The dark
matter clumps and the ordinary matter falls into it. That led to the{{U}}
(10) {{/U}}of the stars and galaxies." Without dark
matter, "there{{U}} (11) {{/U}}be virtually no structures in the
universe." The nature of dark matter is{{U}} (12)
{{/U}}. It cannot be seen or detected{{U}} (13) {{/U}}Astronomers
know it is there because of its effect on celestial objects than can be seen and
measured. But the most dominating force of{{U}} (14)
{{/U}}in the universe is called dark energy. A recently proven power that
astronomers say is causing the galaxies in the universe to separate at a faster
and faster speed. One scientist said it is clear now{{U}}
(15) {{/U}}dark matter and dark energy engaged in a gravitational tug
of war that, eventually, dark energy won. intergalactic adj.
银河间的 gravitation n.
地心吸力，万有引力 pivotal adj. 关键的；举足轻重的
froth n. 泡沫 celestial adj. 天体的 clump v.
凝聚成块