题型：阅读选择 题类： 难易度：普通
浙江省宁波市江北区2023-2024学年九年级上学期期中检测英语试题
It happens every spring. Flowers come out everywhere on the same day. But how do plants "know" when to flower?
For years, it has been a difficult question for scientists. But a US research group may have finally answered it—the secret lies in a protein(蛋白质)called FKF1. This helps plants to know when the days become long and when they get short. Then they can tell the seasons(季节)are changing.
Researchers found the FKF1 protein when they were studying a plant called Arabidopsis. It is sensitive(敏感的)to sunlight, and can be made active by sunlight.
Plants produce this protein every day in the late afternoon all year. If there is no light at this time, for example, in winter when the sun goes down early, the protein won't be active. But when spring comes and the days get longer, the FKF1 protein can be made active by day light and the plants "know" it is time to flower. " If there is light in the late afternoon, plants will know that the days are getting longer and that it is the best time for flowers to come out,"explained Takato Imaizumi, leader of study. But when conditions are poor for growing, such as during autumn or winter when the weather is cold and days are short, plants won' t flower.
Although researchers have only studied how the FKF1 protein works in the Arabidopsis, they believe that it is the same with many other plants, including crops such as rice and wheat.
"If we can control when flowers come out, we might be able to increase crop production," Imaizumi said.
写作要点：
To Be a Better Me | |
健康的生 活习惯 | 1. 足够的睡眠； 2. 坚持锻炼； 3. ……（至少补充一点） |
培养好的 学习习惯 | 1. 课堂上认真听课和做笔记； 2. 课后按时完成作业和及时更正错误； |
相处 | 互相帮助和学习 |
你的看法 | ……（至少补充一点） |
写作要求：
1. 内容必须包含所给要点，并适当发挥；
2. 语句通顺、语法正确、书写规范；
3. 文中不能出现考生的真实姓名、校名和地名；
4. 词数80左右。开头已给出，不计入总词数。
To Be a Better Me
As a student in Grade 9， how can I be better？
……
试题篮
