A population explosion will lead to . [br] It took years for world

游客2024-07-01 40

问题 A population explosion will lead to ______. [br] It took ______ years for world population to grow from 1 billion to 3 billion.

选项 A、100
B、115
C、130
D、145

答案 C

解析本题为计算题，信息点定位在第五段，由1 billion到2 billion需100 years，由2 billion到3 billion需30 years，两者相加130 years，即选项C。

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A population explosion will lead to ______. [br] It took ______ years for world