单项选择题

A．Uganda
B．Ivory Coast
C．Africa
D．Botswana
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它们保护自己的幼儿是一刻也不肯懈怠的。两只眼睛好像燃着的两团烈火。脖子时常要竖着向四方倾听。全身的神经好像紧张得要断裂一样。这样加紧的防御，有时还要变为攻击。即使你不怀敌意地走近它们，它们也要发出一种怪怪的叫声，飞来啄你。摄取食物的时候，它们自己也决不肯先吃，只是咯咯地唤着鸡雏。假如有别的同类要来分争，不管是雄是雌，它们一样地总要毫不留情地扑啄。睡眠或者下雨的时候，要把自己的鸡雏抱在自己的胸胁下，可怜胸脯上的羽毛要抱到一根也没有的程度。像这样的生活，要持续两三个月之久。在这期间，它们的性生活是完全停止的。
问答题
The threat from global warming, he reports, Is very real. It is only a matter of time before the temperature of the surface of the Earth becomes uncomfortable warm. What can we do Well frankly, I don’t believe we’ll ever be able to supply our power needs by simple devices such as windmills. I think the restriction of emissions of greenhouse gases will require the building of nuclear power stations in many places. The single most important development would be if there were some agreement on world population, because global warming will depend intrinsically on how much energy is consumed. But one of the reasons why the human population is growing so fast -- it is unlikely to stop this side of eight billion is precisely because we opted out of natural selection.
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