A-A+

By the time this article was written the popu

2022-08-01 23:05:18 问答库阅读 168 次

问题详情

By the time this article was written, the population of the world was approximately ______.
A．300 million
B．600 million
C．6 billion
D．10 billion

正确答案：C
解析：推断题型文章说到2050年世界人口将达到百亿，比现在人口多三分之二倍；问题是在写这篇文章时世界人口是多少?由此推断出当时人口应是60亿左右(x+2/3x=10)，因此C为答案。