问题
填空题 案例分析题
我国西部资源开采过度，草原植被遭到破坏，生物多样性锐减，由此引起生态环境恶化。保护生态环境，实现可持续发展，已经成为西部开发中面临的最紧迫、最艰巨的任务。下图示一个草原生态系统的营养结构，请据图回答问题：
调查该系统某种毒草的种群密度和调查某种食虫鸟种群密度分别适合采用的调查方法分别是（）
答案
参考答案：样方法和标志重捕法
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我国西部资源开采过度，草原植被遭到破坏，生物多样性锐减，由此引起生态环境恶化。保护生态环境，实现可持续发展，已经成为西部开发中面临的最紧迫、最艰巨的任务。下图示一个草原生态系统的营养结构，请据图回答问题：
调查该系统某种毒草的种群密度和调查某种食虫鸟种群密度分别适合采用的调查方法分别是（）
参考答案：样方法和标志重捕法
用方框中所给单词的适当形式填空，使短文完整正确。
They would do __1__ for their children. Many of them spend most of their spare time __2__ their children with studies. If they have no time or cannot do it themselves, they would hire fanuly teachers __3__ send their children to after-class schools. It seems as if a better __4__ is all that parents expect for children. How can we explain the present situation? First of all, many parents have __5__ that Future success depends more and more __6__ society. there are both losers and __7__. Those who have better skills and more knowledge will enjoy __8__ opportunities skills and education. Secondly, in a competitive (竞争的). Cerlainly, it is important to learn to succeed, but the __9__ thing to learn is how to sulvive (生存) and how to be a qualified citizen (合格的公民). __10__ this is included in good education, the children will surely have a bright future and healthy in bocly mind. |