请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
A．made for
B．set out
C．took off
D．turned up
答案
更多“It's ten years since the scientist ______on his life's work of discovering the valuable ch”相关的问题
第1题
A.has died
B.so
C.has lived
D.since then
第2题
The ten warmest years since 1860 happened after __
A.1987
B.1990
C.2002
第3题
Ten years has passed since we first ______ in Shanghai.
A．met
B．have met
C．was meeting
D．were met
第4题
A．I want to change my job.
B．I hope I can go abroad.
C．I'd love to have Emma's job.
D．When can I go abroad？
第5题
A) since
B) before
C) after
D) when
第6题
How long has Bryant Wore No 8？
A. for two years and a half
B. for ten years
C. since he entered high school
D.since he left high school.
第7题
He ______ in this company since he graduated from Andong Technical College ten years ago.
A) worked B) had worked
C) has been working D) was working
第8题
American newspapers and magazines have been taking public opinion polls since the 1800s. In the 1930s, poll experts such as Elmo Poper and George Gallup began using scientific methods to select and interview participants in political surveys. Since the 1940s, American businesspeople have been developing, naming, packaging, and promoting products with the help of surveys. And also since the 1940s,surveys have been a major research tool among scholars in the social sciences. Psychologists and sociologists have asked people about everything from their religious beliefs to their sexual behavior. The mass media have frequently reported the results of these surveys, and the American public has always been quite interested in the responses.
However, the most complete and most important survey for Americans is the national census. A census is the official count of the number of people living in a city, state, or country. The idea of a census has existed for more than two thousand years. In ancient Rome, the government counted its citizens for purposes of taxation and military service. But the first modern census began here in the United States in 1790. In that year, the population of the new nation was 3 929 214. Since 1790, the American government has taken a census every ten years, and the population has been growing steadily every decade. The 1980 census reported a population of 226 504 825.
In addition to statistics on the total population, the 1980 census has given us a great deal of information about recent changes in American life. One of the many important changes concerns where people live. Americans are still a mainly urban people with about 75 percent of the population living in or near large cities. But, since 1970, the small communities have been gaining population at a faster rate then the cities or suburbs. American have been moving hack to the small towns and the rural areas. This is a dramatic change from the trend in preceding decades. Americans have always done a great deal of moving from one part of the country to enother, but, in recent years, the moves have been mostly to the South and West. States in the "Sun Belt" have been gaining population, and states in the Northeast and the Midwest have been losing population.
Marriage and family life have been changing, too. Americans have been marrying later, having fewer children, getting more divorces, and living more often as singles or as unmarried couples. The actual number of married couples has risen in recent years, but the percentage of married people has declined. Similarly, the number of actual births has gone up, but the size of the average family has gone down. The average young woman of today plans to have only two children.
Along with many other surveys, the national census gives Americans a statistical picture of a changing society. It allows the government and the people to see what's happening and to adjust to the new picture.
The main idea of the passage is that ______.
A．the census gives an accurate count of the number of people in the United States
B．the United States government has taken a census every ten years
C．the census gives a lot of information about population and changes in American life and society
D．according to the latest census, the average American is happier than ever before
第9题
Which statement is CORRECT about the authors surfing learning experience？
A．He took surfing courses to make peace with coastguards.
B．He has learned surfing for ten years since a motor accident.
C．He was the first person to surf on the steep waves of Cribbar.
D．He could finally heave the sail upright quickly in his own way.
第10题
The geologic time period we are now living in is known as the Holocene. This epoch began about 11,000 years ago which was the end of the last glacial period and the end of the Pleistocene epoch. The Pleistocene was an epoch of cool glacial and warmer interglacial periods which began about 1.8 million years ago.
Since the glacial period known as the "Wisconsin" in North America and "Warm" in Europe when over 10 million square miles(about 27 million k㎡) of North America, Asia, and Europe were covered by ice, almost all of the ice sheets covering the land and glaciers in the mountains have retreated. Today about ten percent of the earth's surface is covered by ice; 96% of this ice is located in Antarctica and Greenland. Glacial ice is also present in such diverse places as Alaska, Canada, New Zealand, Asia, and California.
As only I1,000 years has passed since the last Ice Age, scientists can not be certain that we are indeed living in a post-glacial Holocene epoch instead of an interglacial period of the Pleistocene and thus due for another ice age in the geo logic future. Some scientists believe that an increase in global temperatare, as we are now experiencing, could be a sign of an impending ice age and could actually increase the amount of ice on the earth's surface.
The cold, dry air above the Arctic and Antarctica carries little moisture and drops little snow on the regions. An in crease in global temperature could increase the amount of moisture in the air and increase the amount of snowfall. After years of more snowfall than melting, the Polar Regions could accumulate more ice. An accumulation of ice would lead to a lowering of the level of the oceans and there would be further, unanticipated changes in the global climate system as well.
Our short history on earth and oar shorter record of the climate keeps us from fully understanding the implications of global warming. Without a doubt, an increase in the earth's temperature will have major consequences for all life on this planet.
Which of the following is the best title for the passage？
A．Has the Pleistocene Epoch Ended？
B．Another Ice Age in the Aeologle Futurn Is Coming？
C．The Ice Ages: Are They Over？
D．Glacial Ice Will Be Present in Different Places？
