青少年学生是建设文化型社会的主力军，应“以崇尚科学为荣、以愚昧无知为耻”．下列说法没有科学性的是（ ）
A．因为地壳中铁元素比铝元素多，所以铝的价格比铁贵
B．将水煮沸后能形成水垢，这种水不能用于锅炉用水
C．用硫燃烧法熏蒸粉丝和生姜，虽然好看，但不利于健康
D．绿色化学制造出的产品不一定是绿色
A、铝冶炼困难，用电解法制备，铁用热还原的方法制备；碳热还原成本要明显低于电解，因此铝明显比铁成本高，所以要贵，故A说法错误；
B、将水煮沸后能形成水垢，说明为硬水，这种水不能用于锅炉用水，否则时间长了会引起锅炉爆炸，故B说法正确；
C、用硫燃烧法熏蒸粉丝和生姜，虽然好看，但会产生二氧化硫，有毒，不利于健康，故C说法正确；
D、绿色化学是从源头上消除污染，制造出的产品不一定是绿色，故D说法正确．
故选A．
| 完型填空。 | |||
| A thousand years age Hong Kong was covered by a thick forest. As more and more people came to __1__ in Hong Kong, these trees were cut down and burnt. Now there is __2__ forest left, though there are still some small areas covered in trees. We call these woods. Elephants, tigers and many __3__ animals were living in the thick forest. When people came to live in Hong Kong, the __4__ began to die out. Early  farmers grew rice and __5__ pigs and chickens in the valleys. They cut down the trees and burnt them. They needed __6__ to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. __7__ did most of the wolves and tigers. Monkeys and many other animals soon __8__ in the same way. You might think that there are no longer any animals in Hong Kong __9__ in the zoos. But there are still about 36 different animals __10__ there. One of the most interesting of Hong Kong's animals is the barking deer. These are beautiful little animals __11__ a rich brown coat and a white patch (补丁) under the tail. They look like deer but they are much smaller. They are less than two feel __12__. They make a noise rather like a dog __13__. In Hong Kong the barking deer has only a real enemy (敌人) — __14__. People hunt these little animals though it is illegal (违法的). There are now not many barking deer left. So it is important __15___ people to protect wild animals. | |||
| ( )1．A．work ( )2．A．many ( )3．A．other ( )4．A．people ( )5．A．grew ( )6．A．fire ( )7．A．So ( )8．A．lived ( )9．A．besides ( )10. A．live ( )11. A．have ( )12. A．high ( )13. A．shouting ( )14. A．tigers ( )15. A．to | B．study B．a few B．others B．animals B．made B．hotness B．Such B．died B．except B．to live B．without B．higher B．crying B．men B．for | C．live C．no C．the other C．plants C．got C．heat C．As C．came C．and C．lived C．with C．short C．barking C．wolves C．like | D．enjoy D．not D．another D．things D．kept D．stoves (炉子) D．Nor D．left D．or D．living D．get D．shorter D．talking D．elephants D．of |