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A.mean high water
B.mean low water
C.half-tide level
D.mean sea level
答案
更多“The average height of the surface of the sea for all stages of the tide over a 19 year per”相关的问题
第1题
Mean low water is the average height of ______.
A.the surface of the sea
B.high waters and low waters
C.all low waters
D.the lower of the two daily low tides
第2题
Milk has become a popular drink for modem Chinese, not only is its nutritional(营养的) value appreciated, it seems even to have taken the role making the whole nation strong. Milk industry has only about 180 years of history among the Hah people. For a long time, milk was considered a luxury(奢侈的) drink by common people. A widespread saying in the country was that Japan used a cup of milk to strengthen the constitution(体格) of its people. That sounds reasonable because the rich "Ca" in milk definitely benefits the constitution.
The average annual consumption per capita in Japan has risen from less than 10 kilograms immediately after World War II to 68 kilograms today. The average height of Japanese has increased by 11 centimeters during this period. The Chinese Government also hopes to improve the constitution of local people, and since milk is the most obvious nutritious food, it has naturally been picked up. But due to tradition, Chinese people are not in the habit of drinking milk regularly. The annual output of milk in the country is about 10 million tons, compared with an output of alcohol reaching 8 million tons. The annual milk consumption per capita is about 7 kilograms in China while the world's average is about 100 kilograms. The government has noticed the huge gap and plans to raise consumption to 10 kilograms per capita by 2005 and 16 kilograms by 2010. The government has also started plans for "school milk" since the beginning of this century.
Chinese government encourage people to drink milk and hope that ______.
A．the whole nation will become stronger
B．the milk industry will have a faster development
C．milk will no longer be considered a luxury drink
D．its nutritional value will be more appreciated
第3题
Many things in nature, such as sunshine, temperature, and precipitation, affect climate. Nearness to mountain, oceans, and large lakes affects it loo. Another factor is altitude, or height above sea level. Air cools as altitude increases. So a city at a higher altitude may be colder than one at a lower altitude. Finally, winds affect climate. They move heat and moisture between the oceans and continents. Winds keep the tropics from overheating. They keep the polar regions from getting overly cold.
Climate changes over long periods of time. Some scientists think, for example, that the earth' s climate changed at the time of the dinosaurs. They think the dinosaurs died because of the change. What causes a climate to change？ One possible cause may be changes in the sun. Sunspots, for example, are cool, dark spots that form. on the sun. Sunspots may decrease precipitation on the earth and cause unusually dry periods. Changes in the atmosphere may change climate too. Volcanic eruptions, for instance, release solid particles into the air. These particles may form. a cloud that blocks out the sun ' s heat. Human activity is another cause of climate change. Air pollution and the reduction of forest cover may have long-term effects on climate.
This passage is concerned with things that affect______.
A．precipitation
B．climate
C．altitude
D．sunspots
第4题
Obama's success isn't all good news for black Americans
As Erin White watched the election results head towards victory for Barack Obama, she felt a burden lifting from her shoulders. "In that one second, it was a validation for my whole race," she recalls.
"I've always been an achiever," says White, who is studying for an MBA at Vanderbilt University in Nashville, Tennessee. "But there had always been these things in the back of my mind questioning whether I really can be who I want. It was like a shadow, following me around saying you can only go so far. Now it's like a barrier has been let down."
White's experience is what many psychologists had expected - that Obama would prove to be a powerful role model for African Americans. Some hoped his rise to prominence would have a big impact on white Americans, too, challenging those who still harbour racist sentiments. "The traits that characterise him are very contradictory to the racial stereotypes that black people are aggressive and uneducated," says Ashby Plant of Florida State University. "He's very intelligent and eloquent."
Sting in the tail
Ashby Plant is one of a number of psychologists who seized on Obama's candidacy to test hypotheses about the power of role models. Their work is already starting to reveal how the "Obama effect" is changing people's views and behaviour. Perhaps surprisingly, it is not all good news: there is a sting in the tail of the Obama effect.
But first the good news. Barack Obama really is a positive role model for African Americans, and he was making an impact even before he got to the White House. Indeed, the Obama effect can be surprisingly immediate and powerful, as Ray Friedman of Vanderbilt University and his colleagues discovered.
They tested four separate groups at four key stages of Obama's presidential campaign. Each group consisted of around 120 adults of similar age and education, and the test assessed their language skills. At two of these stages, when Obama's success was less than certain, the tests showed a clear difference between the scores of the white and black participants—an average of 12.1 out of 20, compared to 8.8, for example. When the Obama fever was at its height, however, the black participants performed much better. Those who had watched Obama's acceptance speech as the Democrats' presidential candidate performed just as well, on average, as the white subjects.After his election victory, this was true of all the black participants.
Dramatic shift
What can explain this dramatic shift？ At the start of the test, the participants had to declare their race and were told their results would be used to assess their strengths and weaknesses. This should have primed the subjects with "stereotype threat" – an anxiety that their results will confirm negative stereotypes, which has been shown to damage the performance of African Americans.
Obama's successes seemed to act as a shield against this. "We suspect they felt inspired and energised by his victory, so the stereotype threat wouldn't prove a distraction," says Friedman.
Lingering racism
If the Obama effect is positive for African Americans, how is it affecting their white compatriots (同胞)？ Is the experience of having a charismatic (有魅力的) black president modifying lingering racist attitudes？ There is no easy way to measure racism directly; instead psychologists assess what is known as "implicit bias", using a computer-based test that measures how quickly people associate positive and negative words—such as "love" or "evil"—with photos of black or white faces. A similar test can also measure how quickly subjects associate stereotypical traits—such as athletic skills or mental ability—with a particular group.
In a study that will appear in the Journal of Experimental Social Psychology, Plant's team tested 229 students during the height of the Obama fever. They found that implicit bias has fallen by as
A．Excited.
B．Victorious.
C．Anxious.
D．Relieved.
第5题
Study Confirms Red Meat Link with Bowel(结肠)Cancer
People who eat more than 160 grams of red or processed meat a day are 35 percent more likely to develop bowel cancer than those who eat less______(51)20 grams a day, according to one of the biggest nutrition investigations ever carried out.
The European Prospective Investigation into Cancer and Nutrition followed 478,040 men and women______(52)35 to 70 from 10 European countries.
All subjects were free of cancer at enrollment between 1992 and 1998, but ______(53)an average follow-up of almost 5 years 1,329 bowel cancers had been reported.
The subsequent analysis, published in the Journal of the National Cancer Institute, confirms the long-held suspicion______(54)high intakes(纳入量)of red meat are associated with increased bowel______(55)risk.
After taking into consideration factors like age, sex, height, weight, energy intake, physical activity, smoking, and alcohol consumption, the investigators found that bowel cancer was______(56)with intake of red and processed meat but not chicken.
Risk of bowel cancer dropped with increasing intake of fish. Eating more than 80 grams a day of fish was associated______(57)a 31 percent reduction in risk compared with eating less than 10 grams a______(58).
Subjects with high red meat and low fish intake were at 63 percent higher risk of bowel cancer compared with subjects with low red meat and high fish______(59). In addition, the risk of developing the disease was increased for______(60)people who ate a low fibre diet.
Sheila Bingham, study investigator at the UK's Medical Research Council nutrition unit, said: "People have suspected for some time that high levels of red and processed meat______(61)risk of bowel cancer, but this is one of the largest studies worldwide and the first from Europe of this type to show a______(62)relationship."
She added in a statement: "The overall picture is very consistent for red and processed meat and fibre across all the______(63)populations studied."
Study coordinator, Elio Riboli, of the World Health Organization International Agency for Research into Cancer, said: "Other risk factors for______(64)cancer include obesity(肥胖)and lack of physical activity. Smoking and excess alcohol may also play a ______(65). These factors were all taken into account in the analysis."
A．from
B．than
C．between
D．among
第7题
A.height=int(height)
B.height=intheight
C.height=int"height"
D.int(height)
第8题
The desks and Chairs can be ______ to the height of each child.
A．adjusted
B．adopted
C．measured
D．objected
