“the big picture is that these important nonrenewable resources cost about the same today as they did 50 years ago, despite the addition of 4 billion people.”[121] Pollution * In 1970, the Sierra Club adopted a resolution from the organization “Zero Population Growth” calling for measu...
【题目】18.This20% of the children's population compared to only 10% around fiftyyears ago.A. composesB.comprisesC. combines 相关知识点: 试题来源: 解析 【解析】【答案】B【核心短语/词汇】comprise包含,包括,由..组成【翻译】这包括了儿童人口的20%,而50年前仅为10%。【解析】A项“组成,构成(...
因为这个被比对象--名词性从句 ___it was 50 years ago缺表语， 所以只有选what= the population that(which)而that 引导名词性从句时本身无意义， 不能在从句中充当任何成分 如不明白请追问，如果满意请【采纳】祝学习进步
Fif hundred years ago, the population of the world was about 400 million. In 1900, the world's population was under 2 billion. Right now it is doubling(翻倍) every 40 years. That means, if this rate of growth continues(继续), when you are a parent, there will be twice as many ...
(million years ago) (Supplementary Note7, Supplementary Data10, Fig.2aand Supplementary Fig.13), which is much later than previously suggested42. The phylogeny placedP. mume43as the first diverging lineage within the Armeniaca section (4 Mya); theP. brigantinalineage actually diverged first27but...
The population (人口) problem may be the (41) one of the world today. The world’s (42) is growing fast. Two thousand years ago, there were only 250 million people (43) the earth. Four hundred years ago, the number was (44) 500 million. But at the beginning of (45) century, ...
The independent domestication of pigs in western Eurasia and East Asia1,2,3, roughly 10,000 years ago, led to two phenotypically and genetically distinct populations in Europe and China. Subsequent artificial and natural selection has resulted in a wide variety of breeds diverse in appearance, loc...
After saying goodbye to her grandchild at the school gates, Hu Chunmei started to think of ways to pass the day. Hu migrated from her home village in Hubei province to Beijing to help her daughter with child-rearing about eight years ago. Since her granddaughter started school in August, sh...
31.C词语猜测题。由第3段第1句可知,demographic transition指的是传统的高出生率和死亡率向低出生率和低死亡率的转变。32.A主旨大意题。由第1段第1句“Fifty yearsfrom now the world's population will bedeclining, with no end in sight. "可知 A项正确。
The reintroduced population in Ningshan County is unlikely to go extinct in the next 50 years. The population size was estimated to be 367, and the population genetic diversity was estimated to be 0.97. Sensitivity analysis showed that population size and extinction probability were dependent on ...