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河北省昌黎县靖安学区2020-2021学年九年级上学期英语期中考试试题

作者UID:9673734
日期: 2025-01-09
期中考试
单项选择 (共10小题,每小题1分,计10分)
完形填空(共10小题,每小题1分,计10分)
阅读理解(共15小题,每小题2分,计30分)
任务型阅读(共5小题,每小题2分,计10分)
阅读短文,并按要求完成下面小题。

    Do you know that millions of people are still suffering (遭受) from hunger? That's according to the Food and Agriculture Organization of the United Nations. But there could be a solution. According to a study, scientists have found a way to change a plant's genes (基因) to make better use of sunlight, reported Time for Kids.

    Plants use sunlight, water, and carbon dioxide (二氧化碳) to make their own food. The process is called photosynthesis (光合作用). But this is a very slow process.It can take between 10 minutes and one hour for plants to start and finish the photosynthesis process. When a plant is under the sunlight, it will start the photosynthesis process slowly. But if a cloud happens to cover the sunlight, the process will suddenly stop. When the cloud goes away, the plant will slowly restart the process. This makes it hard for plants to get the right amount of sunlight to create food.

    The new study speeds up the process. Plants use less than one percent of the energy available to them. But by changing a plant's genes, the scientists were able to greatly increase the plants' leaf growth. In the test, leaf growth in two plants increased by 20 percent, while leaf growth on a third plant increased by 14 percent. Scientists did the study on tobacco (烟草) plants. And they thought the study would produce the same results in corn and rice. Someday, the process could increase food production around the world.

词语运用(共10小题,每小题1分,计10分)
连词成句(共5小题,每小题1分,计5分)
规范书写(计5分)
书面表达 (计10分)
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