06 科技改变生活-初中英语时事主题阅读天天练

  精品阅读天天练 Date ______________ time __________________ Scientists found why razor blades lose their sharpness. Razor blades are 50 times harder than hair, but hair damages them. Razor blades are made from steel. Every time a blade cuts a hair, the hair damages the blade. Hair makes the blade blunt. This means the life of a razor blade is short. It needs to be replaced often. The scientists got a close-up view through a microscope of a blade cutting a hair. The hair made a small hole on the blade. This hole got bigger as it cut more hair. After more shaving, the blade did not cut cleanly. A scientist said it was interesting that steel failed when it cut hair. He said this is "an important engineering problem". 读后来闯关 1、 阅读短文，完成下面的句子。 1. Scientists found why razor blades ____________ their sharpness. 2. Razor blades are __________ times harder than hair, but hair damages them. 3. Razor blades are __________ from steel. 4. Every time a blade __________ a hair, the hair damages the blade. 5. __________ makes the blade blunt. 6. This means the life of a razor blade is __________. 7. The blade needs to be replaced __________. 8. The __________ got a close-up view through a microscope of a blade cutting a hair. 9. The hair made a __________ hole on the blade. 10. This hole got __________ as it cut more hair. 11. __________ more shaving, the blade did not cut cleanly. 12. A scientist said it was __________ that steel failed when it cut hair. 13. He said this is "__________ important engineering problem". 2、 阅读短文，判断下列说法正（T）误(F)。 1. Some teachers did this research.     2. Razor blades are 500 times harder than hair.     3. The article said a razor blade can cut thousands of hairs when shaving.    4. Scientists used a microscope to look at hairs being cut.     5. The hair made a big hole on the blade. 我爱记单词 razor blade剃须刀刀片 lose失去 sharpness锐度 damage损害 steel钢 blunt迟钝的 replace代替 close-up 凑近地 view视野，观看 microscope显微镜 shave刮胡子 cleanly干净地 engineering工程 三、翻译下列词汇。 razo