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扩容后补充累积损失量的输液速度，一般为每小时每公斤体重
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听力原文： Climate researchers still do not agree on whether the earth will become warmer during the century. Even more importantly, none of them expect the planet to get very much warmer in the foreseeable future. They say that the earth is likely to warm by no more than 2 degrees Centigrade during this century.
Satellite studies indicated that additional cloud cover would moderate any warming trend. Highly ac curate satellite data for the last nineteen years show a slight cooling of the atmosphere. Most of the one-half-degree Centigrade of warming that has occurred in the last one-hundred years took place before 1940—before humanity put very much CO2 into the air. Thus there is strong evidence that the two are unconnected.
Research has only recently produced a computerized climate model able accurately to mimic the weather the world has accurately had. This more-accurate model projects only a 2-degree Centigrade increase in temperatures.
Between 900 AD and 1300 AD, the earth warmed by some 4 to 7 degrees Fahreheit—almost exactly what the models now predict for this century. History books call it the Little Climate Optimum. Written and oral history tells us that the warming created one of the most favorable periods in human history, crops were plentiful, death rates diminished, and trade and industry expanded—while art and architecture flourished,
Researchers tell us that we need not fear a return of the Little Climate Optimum. If there is any global warming in the 21th century, it will produce milder weather that marked the medieval Little Optimum—with the added benefit of more CO2 in the atmosphere and therefore a more luxuriant natural environment.
(30)
据下表资料，如果服用两药后的血压下降值服从正态分布，能否认为服用这两种降压药后，两血压下降值总体平均数相等，服两药后血压下降的mmHg值
A．By way of broadcasts.B．By way of TV.C．By way of film.D．By way of newspaper.
听力原文：W: Good evening! Welcome to our Talk Show program. Our guest today is Mr. David Smith, who had the experiences of studying abroad for seven years and then returning back home. Well, Mr. Smith, do you think going abroad was the hard part？
M: I don't think so, but returning back home was really hard.
W: Why？
M: Well, for many students, returning back to their home countries can be a very confusing experience.
W: Re-entry Shock! That sounds quite interesting. Can you explain it？
M: For example, many students who come to the United States experience freedoms they have never enjoyed in their country.
W: Sure, such as freedom from family, freedom from cultural norms they didn't like and freedom from the pressures of working in a real job.
M: However, too much freedom and unstructured life can lead to other problems. Students sometimes skip classes, stay out late, and engage in activities that their families and cultures might not approve of, but students want to enjoy "freedom" while it lasts.
W: So when students return back to their countries, they can struggle with fitting back into the cultural norms and family expectations of the past.
M: Yes. Naturally, depression is possible and a loss of self can result.
W: Then what can students do to minimize this Re-entry Shock？
M: First of all, keep in contact with your family and friends while you are abroad. They will be your first source of advice and support once you return.
W: What else？
M: Second, have a clear plan what you will do when you return. Start looking for a job now or apply to enter a school months before you return. Re-entry Shock can be greatest when you have nothing to do when you return.
(23)
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