下面是东芳同学列举的一些物态变化的实例，其中错误的说法是（ ）
A．我们看到冰糕冒“白气”是一种汽化现象
B．用久了的灯泡的钨丝比新的细，是由于钨丝升华的缘故
C．冬天，窗户玻璃上的“冰花”是室内空气中的水蒸气凝华而成的
D．从冰箱中取出的汽水瓶表面有水，是冰箱外的水蒸气液化而成的
A、冰糕冒“白气”是由空气中的水蒸气遇到比较冷的冰糕液化形成的；
B、用久了的灯泡的钨丝比新的细，是因为钨丝受热变为钨的蒸汽，是升华现象；
C、窗户玻璃上的“冰花”是室内空气中的水蒸气遇到比较冷的窗玻璃凝华形成的小冰晶；
D、冰箱中取出的汽水瓶温度比较低，空气中的水蒸气遇冷液化形成小水珠附着在汽水瓶的表面．
故选A．
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| Life today is 1 than it was hundreds of years ago, but it has 2 some new problems. One of the biggest problems is pollution. We can see it, smell it, drink it, and 3 hear it. 4 has polluted Earth. The more people, the more .because there were not 5 people. Now man is slowly polluting 6 world. Air pollution is still the most serious among (在……之中) all kinds of pollution. It is bad for all 7 animals. It is caused by heavy traffic. It is said that the situations will be much better if people ride bikes 8 driving cars. When you are riding, there is no pollution. But even in developing countries, most people don't go to work by bike. It is not because bikes are expensive or people are tired if they ride to work, but because the roads for the cars become 9 , more people put away their bikes and go to work by car or by bus, then things are getting 10 . | ||||
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