[单项选择]

When the world was a simpler place, the rich were fat, the poor were thin, and right-thinking people worried about how to feed the hungry. Now, in much of the world, the rich are thin, the poor are fat, and right-thinking people are worrying about obesity.
Evolution is mostly to blame. It has designed mankind to cope with deprivation, not plenty. People are perfectly tuned to store energy in good years to see them through lean ones. But when bad times never come, they are stuck with that energy, stored around their expanding bellies.
Thanks to rising agricultural productivity, lean years are rarer all over the globe. Modernday Malthusians, who used to draw graphs proving that the world was shortly going to run out of food, have gone rather quiet lately. According to the UN, the number of people short of food fell from 920m in 1980 to 799m 20 years later, even though the world’s population increased by 1.6 billion over the period. This is mostly a cause for c
A. worried.
B. indifferent.
C. objective.
D. pessimistic.

最新试题

• ●    [单选题]根据《配电安规》，装设于地面的配电变压器应设有安全围栏，并悬挂（）等标示牌。
• ●    [判断题]《铁运旅客运输规程》中规定，超过免费保管期限时，按日核收保管费。
• ●    [单选题]发现补偿绳断股后，应及时进行（）。
• ●    [判断题] 【考核点:0108030201004;题型:判断题;难度:易;类型:专业】控制系统运行时
• ●    [判断题]“安全红线”是指在铁路运输生产过程中，管理人员或作业人员违章违纪，严重危及安全，特别是严重
• ●    社会工作的知识基础是个庞杂的体系，主要由理论、伦理和（　）组成。