科学家提出硅是“21世纪的能源”、“未来的石油”等观点．假如硅作为一种普遍使用的新型能源被开发利用，关于其有利因素的下列说法中，你认为不正确的是（ ）
A．硅便于运输、贮存，从安全角度考虑，硅是比较安全的燃料
B．自然界中存在大量单质硅
C．硅燃烧放出热量大，且燃烧产物对环境污染程度低，容易有效控制
D．自然界中硅的贮量丰富
A．硅常温下为固体，性质较稳定，便于贮存，较为安全，故A正确；
B．硅在自然界中含量丰富，主要以硅酸盐和二氧化硅的形式存在，仅次于氧，故B错误；
C．硅作为一种普遍使用的新型能源被开发利用说明燃烧放出的热量大，硅燃烧生成二氧化硅，二氧化硅是固体，容易得至有效控制，故C正确；
D．硅在自然界中含量丰富，仅次于氧，故D正确．
故选：B．
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| Which of your two hands do you use most? Very few of us can use 1 of our hands equally(同等的) well. Most of us are right-handed. Only about five people 2 a hundred are left-handed. New-born babies can grasp(抓)objects with 3 of their hands, but in about two years they usually prefer to use their 4 hands. Scientists don't know why this 5 . Monkeys are our 6 relatives(亲戚)in the animal world. Scientists have found that monkeys prefer to use one of their hands more than the 7 -but it can be either hand. There are as many right-handed monkeys as left-handed 8 . Next time you visit the zoo, 9 the monkeys carefully. You'll see that some of them will prefer to use their right hands when they swing(荡秋千), and others will use their left hands. But most human beings(人类)use their right hands better and this makes life 10 for those who prefer to use their left hands. In fact we live in a right-handed world. | ||||
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