7. What happens to the leaves in autumn?相关知识点: 试题来源: 解析 The leaves turn yellow, orange, and red and then fall off the trees. 在秋季,气温下降,日照时间减少,导致树叶中的叶绿素分解。原本存在的类胡萝卜素显现出来,使树叶呈现黄色、橙色和红色。同时,树叶中积累的糖分也促进了颜色变化。
7. The leaves change color and fall off the trees. 8. Farmers harvest their crops and prepare the land and seeds for the next planting season. 7. 秋天,树叶会变色并从树枝上掉落。 这是因为气温下降,日照时间减少,树叶中的叶绿素分解,而黄色和橙色素显现出来。 8. 秋天,农民会收割庄稼,并为下一...
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What happens if you cut down all of a city's trees? 温馨提示 1.文章最前面的词汇,是本视频的一些生词总结,大家可以在看视频之前学习; 2.文中有完整的视频和音频方便大家学习; 3.文章的后半部分,我们对全文做了分解,方便大...
What happens to trees in different seasons?在不同的季节里树木发生什么变化?In winter, it's cold and snowy. 在冬天,天气很冷且多雪。Many trees don't have any leaves.很多树都没有叶子。In spring, the weather is warm...
阅读材料:Autumn is the season of harvest. The leaves turn yellow. 问题:What happens to the leaves in autumn? A. They turn green. B. They turn red. C. They turn yellow. D. They stay the same. 相关知识点: 试题来源: 解析 C。解析:文中说“Autumn is the season of harvest. The ...
What happens to trees' leaves in autumn?相关知识点: 试题来源: 解析 树叶中的叶绿素分解,叶片颜色变为黄色、红色或橙色,最终脱落。 1. **光合作用变化**:秋季日照减少,温度下降,树木开始停止光合作用,分解并回收叶绿素(绿色色素)。2. **色素显露**:叶绿素分解后,原本被掩盖的类胡萝卜素(黄色、橙色)和...
When the stomata on a plant's leaves are open, there are a few things that occur. Carbon dioxide gas is taken in to be used by the cells to make...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answe...
What Happens if a Truck Driver Leaves Scene of an Accident? A truck driver leaving the scene of an accident can lead to severe legal consequences and significant financial, professional, and ethical implications. Truck drivers, their employers, insurers, and, of course, the victims of such ...
the existing chlorophyll in the leaves breaks down. And since it's not been replaced by the new chlorophyll. the green color of the leaves gradually fades away. As this happens, the other pigments present in the leaf become visible.