由时间状语over the past two centuries可知句子的谓语动词使用现在完成时have done的形式,主语the world population为单数,因此助动词使用has。故答案为:has increased。【句意】虽然世界的人口在过去的两个世纪增长了大概六倍,但是生活水平高多了。【点评】根据语境完成句子,分析句子成分,使用单词的适当形式,还应注意...
The population of the world is growing and we need new resources for future development. There are probably vast amounts of resources under the sea and ice, not just oil and gas but also valuable minerals. 世界人口正...
FOR centuries across the world, moms have been homemakers while dads have been breadwinners.However, a recent report shows a milestone(里程碑) change in the social roles of mothers and fathers.The new findings, from the US government's Current Population Survey, show more women in the workpl...
World Population Set To Decline For The First Time In Centuries Says Study华盛顿大学《柳叶刀》生育率下降人口老龄化葡萄牙华盛顿大学研究人员发表在《柳叶刀》的研究报告预测,全球人口将在2064年达到顶峰,约为97 亿,2100年将降至约88亿.研究人员称,这将是第一次由生育率下降而导致的全球人口下降....
V.阅读理解The world's population is over 8 billion now. Some scientists say it will be over 11billion by the year 2100. The rate(比率)of increase will slow down in the second half of this century because of the falling birth rate today.In the last two centuries, great improvements in ...
Since initiating reform and opening up, China has experienced a rapid process of urbanization from a low base. Between 1978 and 2022, the urban population surged from 172 million to 921 million, and their share in the total population jumped f...
Worldwide tiger populations were reduced in the19th and 20th centuries and continue to decline in the 21st century. This is largely due to habitat (栖地) loss and __1__ hunting. Tiger habitat has been reduced to seven percent of the original land. The tiger population once in the hundreds...
The large country in Central Asia spills over into Europe over the west of the Ural River. With an estimated population of just under 19.6 million, Kazakhstan is one of the more sparsely populated nations on this list. The nation became independent from the Soviet Union in 1991 after years ...
which caused soil erosion. The exploding rabbit population provided plentiful food for the cats,meaning that the number of cats also increased. This in turn led to more cats hunting the birds. The end result was that parakeets ...
From hands to ancient tools to animals to advanced machinery.the agricultural scenes have changed greatly over the centuries.Now new and improved farming methods have been considered and studied to keep up with demand.With vertical farming, food is grown vertically,using existing buildings, ...