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 world's population is over seven billion now. Some scientists say it will be over 11 billion 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 ...
Half of the world's population is affected by Asian monsoons(季风), but monsoons are difficult to predict. American researchers have put together a 700-year record of the rainy seasons, which is expected to provide guidance for experts making weather predictions. Every year, moist (潮湿的)...
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 theworkplac...
Over the centuries, sections of the Great Wall have worsened or been torn down. The Badaling section built in the Ming Dynasty is the best preserved and most visited part. In 1987, UNESCO designated the Great Wall a World Heritage Site. It is the largest building construction project ever ...
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...
In 1800, only three percent of the world's population lived in cities. Only one city—Beijing—had a population of over a million. In 1900, just a hundred years later, roughly 150 million people lived in cities, and the world's ten largest cities all had populations exceeding one millio...
“There are two key factors: improvements in access to modern contraception and the education of girls and women,” explained Vollset. “These factors drive the fertility rate – the average number of children a woman delivers over her lifetime which is the largest ...
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....
根据In some small countries, for example, Qatar, United Arab Emirates, and Kuwait, there are more jobs than citizens.The demand for labor is so high that the majority of the population consists of foreign-born workers可知,在一些小国,如Qatar, United Arab Emirates,Kuwait,工作机会比本国公民要多...