内容正文:
冲刺2023中考英语热点新题速递(全国版)
专题05 阅读理解
(解析版)
Passage 01 在太空中种植植物的研究
Passage 02 人类对风能的利用
Passage 03 不同睡姿对人的性格的影响
Passage 04 植物是如何感受光的
Passage 05 “双减”政策后如何度过周末
Passage 06 中国外卖行业的现状及发展。
Passage 07 兔子在中西文化中的意义
Passage 08 自动驾驶汽车
Passage 09 一种新的AI技术ChatGPT
Passage 10 脸盲症
Passage 11 扔掉旧手机的危害及如何处理旧手机
Passage 12 电动汽车
Passage 13 知识付费
Passage14 我们会尴尬的原因及如何应对尴尬
Passage 15 如何成为高效率的人
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Passage 01 在太空中种植植物的研究
(2023·山东济南·统考二模)What will astronauts(宇航员)eat when a space trip takes years?
“Lots of fresh vegetables,” says Dr. Janet Williams, whose team have spent the last 10 years learning how to grow plants in a space station. And it’s a good thing that she has already started her work, because space gardening can be really hard.
As usual, astronaut George White looked into the closed plant room. He had planted Dr. Williams’s quick-growing seedlings in it, but none of the stems were showing. He opened the room to check and found the problem. The stems weren’t growing upward and the roots weren't growing downward. On Earth, gravity(重力)helps a plant’s stems and roots to find “up”and “down”. However, in the space station, there was almost no gravity.
Dr. Williams suggested a solution: give the plants more light, as plants also use sunlight to find their way. And it worked. When the plants had more light, the stems turned up and the roots went down.
Now Dr. Williams was free to worry about the next problem:Would her baby plants live to flower? Can we grow food on a space journey?
Many plants died in the space station. Dr. Williams thought she knew why: the space plants were hungry for air. Plants live by taking up CO2 from the air. Since a plant uses it up in the air around, the plant needs moving air to bring more CO2 close to its surface! On Earth, the air is always moving. Gravity pulls down cold air, and warm air rises. And with these air movements, plant