首页
登录
职称英语
1 In the second half of the 20th century, the world became, quite literally, a d
1 In the second half of the 20th century, the world became, quite literally, a d
游客
2023-11-19
64
管理
问题
1 In the second half of the 20th century, the world became, quite literally, a darker place.
2 Defying expectation and easy explanation, hundreds of instruments around the world recorded a drop in sunshine reaching the surface of Earth, as much as 10 percent from the late 1950’s to the early 90’s, or 2 percent to 3percent a decade. In some regions like Asia, the United States and Europe, the drop was even steeper. In Hong Kong, sunlight decreased 37 percent.
3 No one is predicting that it may soon be night all day, and some scientists theorize that the skies have brightened in the last decade as the suspected cause of global dimming, air pollution, clears up in many parts of the world.
4 Yet the dimming trend — noticed by a handful of scientists 20 years ago but dismissed then as unbelievable — is attracting wide attention.
5 "There could be a big gorilla sitting on the dining table, and we didn’t know about it," said Dr. Veerabhadran Ramanathan, a professor of climate and atmospheric sciences at the University of California, San Diego. "There are many, many issues that it raises."
6 Dr. James E. Hansen, director of the NASA Goddard Institute for Space Studies in Manhattan, said that scientists had long known that pollution particles reflected some sunlight, but that they were now realizing the magnitude of the effect.
7 "It’s occurred over a long time period," Dr. Hansen said. "So it’s not something that, perhaps, jumps out at you as a person in the street. But it’s a large effect."
8 Satellite measurements show that the sun remains as bright as ever, but that less and less sunlight has been making it through the atmosphere to the ground.
9 Pollution dims sunlight in two ways, scientists theorize. Some light bounces off soot particles in the air and goes back into outer space. The pollution also causes more water droplets to condense out of air, leading to thicker, darker clouds, which also block more light. For that reason, the dimming appears to be more pronounced on cloudy days than sunny ones. Some less polluted regions have had little or no dimming.
10 The dynamics of global dimming are not completely understood. Antarctica, which would be expected to have clean air, has also dimmed.
11 "In general, we don’t really understand this thing that’s going on," said Dr. Shabtai Cohen, a scientist in the Israeli Agriculture Ministry who has studied dimming for a decade. "And we don’t have the whole story." [br] What does the passage mainly discuss?
选项
A、Sunshine diminishes 10% to 37%
B、Why does the globe tend to dim?
C、Globe grows darker
D、Pollution dims sunlight in two ways
答案
C
解析
主旨题。在第一段首句。“In the second half of the 20th century, the world became, quite literally, a darker place”可找到答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3199891.html
相关试题推荐
What’sthechangeinAmericanfamilyinthe21century?[br][originaltext]A
What’sthechangeinAmericanfamilyinthe21century?[br][originaltext]A
Gunpowderwasdiscoveredinthetwelfthcentury,but_________.A、mandidnotput
Nancybecameataxidriverbecause______.[br][originaltext]Interviewer:Hell
Nancybecameataxidriverbecause______.[originaltext]Interviewer:Hello,Nan
Justafewsecondsoffrenziedpassiononthefloorofthepublicbarandt
Justafewsecondsoffrenziedpassiononthefloorofthepublicbarandt
Justafewsecondsoffrenziedpassiononthefloorofthepublicbarandt
[audioFiles]audio_ezf_m_0452(20101)[/audioFiles]Ourbusy21stcenturyworl
Soonafterthedrug______effect,thepatientbecamequieter.A、broughtB、madeC
随机试题
Thisroomcanbeused______meeting.A、asB、forC、withB本题考察介词的用法,备选答案中for表示目的。a
Carefultestingisnecessarybeforeanymoreexperimentscancontinuewiththee
不少专家指责那位作者,因为他的书里有大量剽窃的内容。(criticize,plagiarism)Manyexpertscriticizedtheauth
Papermoneyisusedeverydaybutpeopledonotoftenthinkofmoneyasjust
统计表的制表原则有()。A.重点突出,简单明了 B.一张表只有一个中心内容,明
计量认证的专业类别代码中,代表交通的是()。A.R B.N C.P
患儿男,出生15天。频繁呕吐,呈喷射样,不含胆汁,近2天尿少,未排大便。查体:中
在教学中要培养学生良好的认知内驱力,其诀窍就是要想法设法让学生在学习过程中能够不
按照NCCLSH20-A规定,评估仪器时,白细胞分类计数的白细胞数量至少为A.1
控制消化道平滑肌收缩节律的基础是A.慢波 B.动作电位 C.壁内神经丛活动
最新回复
(
0
)