2. 外语
  3. Whenever I hear a weather report declaring it’s the hottest June 10 on record or whatever, I can’t take it too seriously, becaus

Whenever I hear a weather report declaring it’s the hottest June 10 on record or whatever, I can’t take it too seriously, becaus

admin2017-06-11  61
问题     Whenever I hear a weather report declaring it’s the hottest June 10 on record or whatever, I can’t take it too seriously, because "ever" really means "as long as the records go back" , which is only as far as the late 1800s. Scientists have other ways of measuring temperatures before that, though—not for individual dates, but they can tell the average temperature of a given year by such proxy measurements as growth marks in corals, deposits in ocean and lake sediments, and cores drilled into glacial ice. They can even use drawings of glaciers as there were hundreds of years ago compared with today.
    And in the most comprehensive compilation of such data to date, says a new report from the National Research Council, it looks pretty certain that the last few decades have been hotter than any comparable period in the last 400 years. That’s a blow to those who claim the current warm spell is just part of the natural up and down of average temperatures—a frequent assertion of the global—warming-doubters crowd.
    The report was triggered by doubts about past-climate claims made last year by climatologist Michael Mann, of the University of Virginia(he’s the creator of the "hockey stick" graph AI Gore used in "An Inconvenient Truth" to dramatize the rise in carbon dioxide in recent years). Mann claimed that the recent warming was unprecedented in the past thousand years—that led Congress to order up an assessment by the prestigious Research Council. Their conclusion was that a thousand years was reasonable, but not overwhelmingly supported by the data. But the past 400 was—so resoundingly that it fully supports the claim that today’s temperatures ale unnaturally warm, just as global warming theory has been predicting for a hundred years. And if there’s any doubt about whether these proxy measurements are really legitimate, the NRC scientists compared them with actual temperature data from the most recent century, when real thermometers were in widespread use. The match was more or less right on.
    In the past nearly two decades since TIME first put global warming on the cover, then, the argument against it has gone from "it isn’t happening" to "it’s happening, but it’s natural" , to "it’s mostly natural" —and now, it seems, that assertion too is going to have to drop away. Indeed. Rep. Sherwood Boehert, the New York Republican who chairs the House Science Committee and who asked for the report declared that it did nothing to support the notion of a controversy over global warming science—a controversy that opponents keep insisting is alive. Whether President Bush will finally take serious action to deal with the warming, however, is a much less settled question.
What is "proxy measurement" in Paragraph 1 likely to refer to?
选项 A、Studying the characteristics of glaciers.
B、Measuring the growth signs of aquatic organism.
C、Taking advantage of previous pictures.
D、Using clues left from the past.
答案D
解析 本题是词汇题。通过前半句“Scientists have other ways of measuring temperaturesbefore that，…but they can tell the average temperature of a given year by such proxymeasurements…”，科学家虽不能测出地球历史上每天的准确温度，但能通过“某种测量方式”推测出它的年平均温度，由此可猜到这种方式是一种间接测量，以获得平均值。后面解释了间接测量方式的情况“…as growth marks in corals，deposits in ocean and lake sediments，…as there were hundreds of years ago compared with today．”．即通过测量地球在过去遗留下来的东西，来获取地球温度的间接数据。故D“利用以前留下的线索”正确。
转载请注明原文地址:https://kaotiyun.com/show/UNFO777K
0

考博英语

相关试题推荐
随机试题
最新回复(0)