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KEY→P22
范畴:人与自然 主题:人与植物 体裁:说明文 难度:★★★★ 建议用时:8分钟 评价:/4
The biggest plant in the world has just been discovered, researchers from The University of Western Australia and Flinders University say. The plant is at least 4,500 years old. The ancient seagrass stretches about 180 kilometres. The plant was discovered in Shark Bay along the west coast of Australia, when researchers were trying to determine which plants should be collected for seagrass restoration.
Seagrass is flowering plants. People usually find it in shallow waters near coastal areas. It grows together in thick fields, which are known as meadows(草地). Seagrass meadows help clean the ocean water. They also provide homes and sources of food for many marine organisms(生物).
Climate change and human pollution are harming seagrass meadows in many places around the world. But this huge seagrass meadow seems to be doing very well. It's a kind of seagrass called Posidonia australis.
Scientists wanted to study the seagrass, so they took samples from 10 different parts of this huge meadow. What they learned shocked them—all of the grass samples had almost the same DNA. It meant that the plant spread out over an area of about 200 square kilometres. This made it the largest known plant in the world.
The researchers are now doing experiments in Shark Bay to understand how this plant lives and grows under such uncertain conditions.
(
A. It is about 180 kilometres long.
B. It appeared at least 4,500 years ago.
C. It can help other seagrass grow.
D. It lives on the west coast of Australia.
(
A. The living environment and uses.
B. Sources and growth.
C. Colours and weight.
D. Shapes and sizes.
(
A. Because DNA of its samples was almost the same.
B. Because all parts of the seagrass joined each other.
C. Because its samples had the same flowers.
D. Because no such seagrass was in other areas.
(
A. The researchers from America discovered the biggest plant in the world.
B. The seagrass usually grows in deep waters far away from coastal areas.
C. The biggest plant in the world called Posidonia australis is in danger now.
D. The researchers are trying to understand how this plant lives and grows.
英语嗨吧
KEY→P22
范畴:人与自然 主题:人与植物 体裁:说明文 难度:★★★★ 建议用时:8分钟 评价:/4
The biggest plant in the world has just been discovered, researchers from The University of Western Australia and Flinders University say. The plant is at least 4,500 years old. The ancient seagrass stretches about 180 kilometres. The plant was discovered in Shark Bay along the west coast of Australia, when researchers were trying to determine which plants should be collected for seagrass restoration.
Seagrass is flowering plants. People usually find it in shallow waters near coastal areas. It grows together in thick fields, which are known as meadows(草地). Seagrass meadows help clean the ocean water. They also provide homes and sources of food for many marine organisms(生物).
Climate change and human pollution are harming seagrass meadows in many places around the world. But this huge seagrass meadow seems to be doing very well. It's a kind of seagrass called Posidonia australis.
Scientists wanted to study the seagrass, so they took samples from 10 different parts of this huge meadow. What they learned shocked them—all of the grass samples had almost the same DNA. It meant that the plant spread out over an area of about 200 square kilometres. This made it the largest known plant in the world.
The researchers are now doing experiments in Shark Bay to understand how this plant lives and grows under such uncertain conditions.
(
C
)1. Which of the following is NOT true about the biggest seagrass in the world?A. It is about 180 kilometres long.
B. It appeared at least 4,500 years ago.
C. It can help other seagrass grow.
D. It lives on the west coast of Australia.
(
A
)2. What can we know about seagrass from Paragraph 2?A. The living environment and uses.
B. Sources and growth.
C. Colours and weight.
D. Shapes and sizes.
(
A
)3. Why did scientists think the 200-square-kilometre seagrass was a plant?A. Because DNA of its samples was almost the same.
B. Because all parts of the seagrass joined each other.
C. Because its samples had the same flowers.
D. Because no such seagrass was in other areas.
(
D
)4. Which of the following is TRUE according to the passage?A. The researchers from America discovered the biggest plant in the world.
B. The seagrass usually grows in deep waters far away from coastal areas.
C. The biggest plant in the world called Posidonia australis is in danger now.
D. The researchers are trying to understand how this plant lives and grows.
英语嗨吧
答案
[B] C A A D
本文介绍了研究人员最近在澳大利亚西海岸发现的世界最大植物。
1. C 细节理解题。由第一段内容可知,这个世界上最大的植物至少有 4 500 岁了,也就是说它出现在至少 4 500 年前。它的长度约 180 千米。它在澳大利亚西海岸被发现了,故 A、B、D 项陈述正确。
2. A 推理判断题。由第二段内容可知,海草是开花植物,它们常常集体生活在近海浅水中并形成海草地,海草地能帮助净化海洋水质,也为很多海洋生命提供栖息地和食物来源。由此可知,本段谈论的是海草的生活环境及其用途。
3. A 细节理解题。由“all of the grass samples had almost the same DNA. It meant that the plant spread out over an area of about 200 square kilometres.”可知,所有海草样本有几乎同样的 DNA,那意味着这棵植物延展了超过 200 平方千米的区域。也就是说,科学家之所以认为这 200 平方千米海域的海草是一棵植物,是基于其几乎相同的 DNA 样本。
4. D 细节理解题。由最后一段内容可知,研究者现在正在做实验,以了解这棵植物是如何在如此不确定的环境下生存并生长的。故 D 项陈述正确。
本文介绍了研究人员最近在澳大利亚西海岸发现的世界最大植物。
1. C 细节理解题。由第一段内容可知,这个世界上最大的植物至少有 4 500 岁了,也就是说它出现在至少 4 500 年前。它的长度约 180 千米。它在澳大利亚西海岸被发现了,故 A、B、D 项陈述正确。
2. A 推理判断题。由第二段内容可知,海草是开花植物,它们常常集体生活在近海浅水中并形成海草地,海草地能帮助净化海洋水质,也为很多海洋生命提供栖息地和食物来源。由此可知,本段谈论的是海草的生活环境及其用途。
3. A 细节理解题。由“all of the grass samples had almost the same DNA. It meant that the plant spread out over an area of about 200 square kilometres.”可知,所有海草样本有几乎同样的 DNA,那意味着这棵植物延展了超过 200 平方千米的区域。也就是说,科学家之所以认为这 200 平方千米海域的海草是一棵植物,是基于其几乎相同的 DNA 样本。
4. D 细节理解题。由最后一段内容可知,研究者现在正在做实验,以了解这棵植物是如何在如此不确定的环境下生存并生长的。故 D 项陈述正确。
