C
Seagrass, an underwater plant that grows on the ocean floor, is very important for sea life. It also helps prevent global warming by storing carbon dioxide, a kind of gas. However, scientists don't know exactly how much seagrass is there at the bottom of the ocean. With the help of tiger sharks, a team of researchers has discovered the world's largest seagrass meadow(grassland) on the seafloor near the Bahamas.
Seagrass meadows are home to many different kinds of fish, shellfish, and so on. Large sea animals like sharks also spend a lot of time there looking for food. Seagrass can grow in very deep and dark waters, making it difficult to find. But sharks can dive deep into the water and get to the areas people cannot reach.
After noticing tiger sharks swimming through seagrass off the Bahamas, an American scientist worked with a seagrass expert, trying to map the locations of the plant. The researchers fitted seven tiger sharks with cameras. Since tiger sharks swim in groups, they placed satellite tracking tags(卫星跟踪器) on eight other sharks to find out exactly where the animals swam. They gathered hours of videos of the tiger sharks swimming through seagrass.
The researchers found more seagrass growing near the Bahamas than they expected—in fact, they believed that there was more seagrass there than anywhere else on the earth. The new finding increased the total number of seagrass known to exist by 41%. However, more research is needed to discover the true size of the seagrass meadow.
Scientists often depend on findings from divers(潜水员) and boats to study the underwater world, but this team found that working with animals improved their understanding. They are now placing cameras on sea turtles to study seagrass in the Red Sea. Hopefully, more mysteries about seagrass will be solved.
(
A. Because seagrass is too small to be seen.
B. Because it grows in very deep and dark areas.
C. Because it's difficult to reach the bottom of the sea.
D. Because tiger sharks almost eat it all up.
(
A. The reason for the research.
B. The method to do the research.
C. The discovery of the research.
D. The scientists of the research.
(
A. By hiring more divers and boats.
B. By using better cameras.
C. By having discussions with seagrass experts.
D. By working with animals.
(
A. show a special project on global warming
B. describe the features of sea animals
C. share a new way of doing undersea research
D. tell the importance of seagrass
Seagrass, an underwater plant that grows on the ocean floor, is very important for sea life. It also helps prevent global warming by storing carbon dioxide, a kind of gas. However, scientists don't know exactly how much seagrass is there at the bottom of the ocean. With the help of tiger sharks, a team of researchers has discovered the world's largest seagrass meadow(grassland) on the seafloor near the Bahamas.
Seagrass meadows are home to many different kinds of fish, shellfish, and so on. Large sea animals like sharks also spend a lot of time there looking for food. Seagrass can grow in very deep and dark waters, making it difficult to find. But sharks can dive deep into the water and get to the areas people cannot reach.
After noticing tiger sharks swimming through seagrass off the Bahamas, an American scientist worked with a seagrass expert, trying to map the locations of the plant. The researchers fitted seven tiger sharks with cameras. Since tiger sharks swim in groups, they placed satellite tracking tags(卫星跟踪器) on eight other sharks to find out exactly where the animals swam. They gathered hours of videos of the tiger sharks swimming through seagrass.
The researchers found more seagrass growing near the Bahamas than they expected—in fact, they believed that there was more seagrass there than anywhere else on the earth. The new finding increased the total number of seagrass known to exist by 41%. However, more research is needed to discover the true size of the seagrass meadow.
Scientists often depend on findings from divers(潜水员) and boats to study the underwater world, but this team found that working with animals improved their understanding. They are now placing cameras on sea turtles to study seagrass in the Red Sea. Hopefully, more mysteries about seagrass will be solved.
(
B
)8. Why is seagrass difficult to find under the water?A. Because seagrass is too small to be seen.
B. Because it grows in very deep and dark areas.
C. Because it's difficult to reach the bottom of the sea.
D. Because tiger sharks almost eat it all up.
(
B
)9. What is Paragraph 3 mainly about?A. The reason for the research.
B. The method to do the research.
C. The discovery of the research.
D. The scientists of the research.
(
D
)10. How will scientists work out the mysteries about seagrass?A. By hiring more divers and boats.
B. By using better cameras.
C. By having discussions with seagrass experts.
D. By working with animals.
(
C
)11. The article is written to .A. show a special project on global warming
B. describe the features of sea animals
C. share a new way of doing undersea research
D. tell the importance of seagrass
答案：8. B 【点拨】根据“Seagrass can grow in very deep and dark waters, making it difficult to find.”可知，海草可以生长在非常深和黑暗的水域，很难被找到。故选B。
9. B 【点拨】根据第三段内容可知，本段主要讲了研究方法。故选B。
10. D 【点拨】根据“Scientists often depend on findings from divers（潜水员）and boats to study the underwater world, but this team found that working with animals improved their understanding.”可知，科学家通过和动物合作来解开海草之谜。故选D。
11. C 【点拨】通读全文可知，本文主要介绍了海草的重要性以及科学家如何利用虎鲨进行海底研究，即分享了一种新的海底研究方法。故选C。
9. B 【点拨】根据第三段内容可知，本段主要讲了研究方法。故选B。
10. D 【点拨】根据“Scientists often depend on findings from divers（潜水员）and boats to study the underwater world, but this team found that working with animals improved their understanding.”可知，科学家通过和动物合作来解开海草之谜。故选D。
11. C 【点拨】通读全文可知，本文主要介绍了海草的重要性以及科学家如何利用虎鲨进行海底研究，即分享了一种新的海底研究方法。故选C。
解析：
【分析】
这是一篇英语阅读理解题，需根据原文内容解答细节理解、段落主旨和文章主旨类题目：
1. 第8题是细节理解题，需定位原文中关于海草难被发现的原因的句子；
2. 第9题是段落主旨题，需梳理第三段核心内容，判断其主要围绕的研究方向；
3. 第10题是细节理解题，定位原文中科学家解开海草之谜的方式的相关语句；
4. 第11题是文章主旨题，需通读全文，把握作者的写作意图。
【解析】
8. 根据原文第二段“Seagrass can grow in very deep and dark waters, making it difficult to find.”可知，海草生长在非常深和黑暗的水域，因此难以被发现，对应选项B。
9. 第三段主要讲述了科学家与虎鲨合作，通过给虎鲨安装相机、卫星跟踪器来绘制海草位置的具体操作，核心是研究方法，对应选项B。
10. 根据原文最后一段“Scientists often depend on findings from divers and boats to study the underwater world, but this team found that working with animals improved their understanding.”可知，科学家通过与动物合作来解开海草之谜，对应选项D。
11. 通读全文，文章既介绍了海草的重要性，又重点讲述了科学家利用虎鲨等动物进行海底海草研究的新方法，写作目的是分享这种新的海底研究方式，对应选项C。
【答案】
8.B 9.B 10.D 11.C
【知识点】
英语阅读理解、细节理解、主旨大意
【点评】
本文围绕海草的重要性及相关研究展开，考察学生对原文细节的定位能力和对段落、文章主旨的把握能力，是一篇贴近科学研究的阅读理解材料。
【难度系数】
0.6
这是一篇英语阅读理解题，需根据原文内容解答细节理解、段落主旨和文章主旨类题目：
1. 第8题是细节理解题，需定位原文中关于海草难被发现的原因的句子；
2. 第9题是段落主旨题，需梳理第三段核心内容，判断其主要围绕的研究方向；
3. 第10题是细节理解题，定位原文中科学家解开海草之谜的方式的相关语句；
4. 第11题是文章主旨题，需通读全文，把握作者的写作意图。
【解析】
8. 根据原文第二段“Seagrass can grow in very deep and dark waters, making it difficult to find.”可知，海草生长在非常深和黑暗的水域，因此难以被发现，对应选项B。
9. 第三段主要讲述了科学家与虎鲨合作，通过给虎鲨安装相机、卫星跟踪器来绘制海草位置的具体操作，核心是研究方法，对应选项B。
10. 根据原文最后一段“Scientists often depend on findings from divers and boats to study the underwater world, but this team found that working with animals improved their understanding.”可知，科学家通过与动物合作来解开海草之谜，对应选项D。
11. 通读全文，文章既介绍了海草的重要性，又重点讲述了科学家利用虎鲨等动物进行海底海草研究的新方法，写作目的是分享这种新的海底研究方式，对应选项C。
【答案】
8.B 9.B 10.D 11.C
【知识点】
英语阅读理解、细节理解、主旨大意
【点评】
本文围绕海草的重要性及相关研究展开，考察学生对原文细节的定位能力和对段落、文章主旨的把握能力，是一篇贴近科学研究的阅读理解材料。
【难度系数】
0.6