题干

下面一段话中标序号的句子均有语病或错别字,请在原文上改正。

目前,地球的绿色之肺——森林正在日益萎缩。(1)近200年来,地球上的森林大约已有三分之一左右被采伐和毁掉。而另一方面,由于地球上的燃烧物增多,(2)二氧化碳的排放量在强烈增加。此消彼长,使得地球生态环境恶化。这导致全球气候变暖

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上一题 下一题 0.0难度 选择题 更新时间:2016-01-11 04:41:08

答案(点此获取答案解析)

删掉“大约”与“左右。,“强烈增加”改为“急剧增加”或“大量增加”。

同类题5

阅读理解

    Bill Gates recently predicted that online learning will make place-based colleges less significant, and five years from now, students will be able to find the best lectures in the world online. I applaud Mr. Gates. But what's taking us so long?

    As early as 1997, MIT (麻省理工) decided to post videos of all university lectures online, for free, for all people. But today, how many students have you met who mastered advanced mathematics or nuclear physics from an MIT online video? Unfortunately, the answer is not many.

    The problem is the poor quality of online education websites and the experience they provide to students. Those who go to the MIT website and watch courses online are surely very smart people, but it's not like playing a video game such as World of Warcraft. Only the most ardent students, those who are highly motivated, will devote themselves to studying these boring online videos.

    The real question is why we aren't spending more to develop better online education platforms. Where is the Avatar of education? Think about this. The market for Hollywood films per year is worth around 30 billion USD. Education in the world is a trillion-dollar-a-year market, hundreds of times bigger than Hollywood movies. Yet the most expensive digital learning system ever built cost well under 100 million dollars.

    Bill Gates' prediction is going to happen. There is no doubt about it. But it will only happen when we create high level educational content and experiences that engage and excite more than has ever been possible in the real world.