Unit 3 The world of science（共3份，含解析）——高一英语外研版（2019）必修第三册同步课时作业

Unit 3 The world of science Developing Ideas———高一英语外研版（2019）必修第三册同步课时作业 一、语法填空 1. There is no doubt that we should attach great importance _____ environmental problems. 2. To our great relief, the plan _____ (draft) by our team won the approval of all judges. 3. The job market has changed and our approached to _____ (find) jobs must change as well. 4. Only recently, however, have they come up with _____ (prove) that brains work this way. 5. It's partly that his writings rode a wave of social, political and _____ (science) progress. 6. If you hadn't spent such a long time getting dressed, we _____ (be) there by now. 7. Most students in our class go in for all kinds of _____ (science) activities. 8. The most pleasant thing of the rainy season is that one can be _____ (entire) free from dust. 9. A stable, open and prosperous China will surely make still more _____ (contribute) to world peace and development. 10. What is stressful for one person may not be stressful for another; each of us responds to stress in an _____ (entire) different way. 二、七选五 Too much screen time may cause serious eye strain(眼疲劳) and even a sharp decline of eyesight. That's a big problem a lot of people are faced with nowadays, especially those who work on a computer. The following tips may be helpful. Get regular eye tests. Experts recommend having a comprehensive eye exam every year to detect problems before they develop. During this test, you should tell the doctor how often you use your phone and your computer. ① _____ Tell your doctor about it, and your eyes can be tested more accurately at that distance. Give your eyes space. ② _____ Studies on computer-related eye strain suggest that screens should be no closer than 40 cm from your face. If this makes it hard for you to read, consider increasing the size of the text rather than moving the screen closer. Take breaks. This may not always be practical if you're quite busy, but it's important not to stare directly at a screen for too long. ③ _____ While surveys have shown that many office workers take no more than half an hour a day away from their computers, it's recommended that you take a 15-minute break after every two hours spent at your screen. ④ _____ Staring at a screen continuously for hours on end may make it difficult for you to focus. To avoid this, many eye experts recommend the "20-20-20 rule"—looking away from your phone/computer screen every 20 minutes and focusing on an object at least 20 feet away for at least 20 seconds. The science behind this trick is that looking at objects at a distance relaxes the focusing muscle in the eye. ⑤ _____ A. Exercise your eyes. B. Give your eyes a chance to rest. C. Make your screen more eye-friendly. D. Studies show it's an effective way to reduce tiredness. E. You should also measure the distance from your eyes to your screen at work. F. The closer your phone/computer screen is to your eyes, the harder they have to work to focus ... ...