上海市静安区2021-2023年中考英语二模试题分类汇编：回答问题

上海市静安区 2021-2023年中考英语二模试题分类汇编 回答问题 2023年上海市静安区中考二模英语试题 IX. Answer the questions (根据以下内容回答问题) (12分) Face to the Sunshine “Keep your face to the sunshine and you cannot see the shadows” is a popular saying. It encourages people to make the best of a situation, to see the “bright side” of things. It calls attention to the way sunflowers follow the sun during the day. People have known about this phenomenon (现象) for a long time. Recently scientists have discovered how this works. They know why sunflowers keep their “faces” to the sunshine. Sunflowers move and respond to their environment. These flowers actually face the sun as it rises in the cast and follow it as it moves across the sky until it sets in the west. Just like people. these flowers depend on the daily rhythms (节奏) of the day and night. Both the sunflowers and human beings wake up in the morning, follow the sun all day and then rest at night. During the day, young sunflower plants track the sun from east to west. The green flower head turns towards the sun. At night, the young plants turn east waiting for the sun to rise in the morning. Adult sunflowers don’t move. Once the flower is open, it faces only east. Scientists have discovered that this movement and lack of movement has to do with uneven (不均匀的) growth in the plant stems. One side of the stem gets bigger during the day, and at night the other side gets bigger. Certain genes (基因) control this growth. They respond to the light and cause the flowers to turn to face the sun. Scientists have found that young sunflowers that follow the sun have more biomass (生物量) —that means that they get bigger. Adult plants facing the cast get warmer. That in turn attracts more bees and other insects that will help pollinate(授粉) the plant. This means that the plant can produce seeds and has a better chance of reproducing. 78. The material above is a news report, isn’t it? 79. What do sunflowers usually do during the day? 80. Why do both sunflowers and human beings