登录
B
The ocean waters rise and fall along the coast(海岸). This movement is called the tide(潮汐). When the tide comes in, the ocean rises. The rocks along the coast are covered in water. When the tide goes out, some of the salt water stays behind in large holes in the rocks. This causes tide pools. The animals that live in tide pools, such as crabs, sea stars, and mussels(贻贝), have to get used to the changes in the water. They must face large waves, the hot sun, and hungry meat-eating animals.
When the tide is high, animals in tide pools are covered with water. This protects them from the strong sun. ▲ And the tide can wash the meat-eating animals away too.
When the tide is low, the animals in tide pools have to move to another world. Many of them are no longer covered by water. They are not safe because of the sun's heat or hungry animals. There is less food for animals such as mussels in the tide pools. Mussels are protected by hard shells. When food passes by, a mussel opens its shell to eat. It closes its shell when danger comes around the corner. Hungry sea stars will hit a mussel, hoping to find a way into its shell. Crabs search for dead plants and animals while keeping away from seagulls(海鸥).
In fact, life in a tide pool is also an adventure(冒险) like humans.
()21. Which of the following sentences can be put in the blank “▲”?
A. The tide can also bring in food for the animals.
B. They sometimes face hungry meat-eating animals.
C. They even have less food to feed on.
D. The danger may come around the corner.
()22. What may a mussel do when food passes by?
A. Find a way to run. B. Keep its shell closed.
C. Open its shell to eat. D. Search for dead plants.
()23. When a sea star meets the mussels, what may happen next?
A. A crab would find a way into mussels' shells.
B. Seagulls would search for the mussels.
C. The sea star would eat the mussels.
D. The mussels would open their shells.
()24. What's the RIGHT structure of the passage? (①=Paragraph 1, ②=Paragraph 2...)
A. ①②/③④ B. ①/②③/④ C. ①②/③/④ D. ①/②③④
()25. What can we infer from the last paragraph?
A. Only animals may face adventures in life.
B. The animals in tide pools can't live without water.
C. Humans needn't face an adventure in life.
D. Life is always full of adventures.
The ocean waters rise and fall along the coast(海岸). This movement is called the tide(潮汐). When the tide comes in, the ocean rises. The rocks along the coast are covered in water. When the tide goes out, some of the salt water stays behind in large holes in the rocks. This causes tide pools. The animals that live in tide pools, such as crabs, sea stars, and mussels(贻贝), have to get used to the changes in the water. They must face large waves, the hot sun, and hungry meat-eating animals.
When the tide is high, animals in tide pools are covered with water. This protects them from the strong sun. ▲ And the tide can wash the meat-eating animals away too.
When the tide is low, the animals in tide pools have to move to another world. Many of them are no longer covered by water. They are not safe because of the sun's heat or hungry animals. There is less food for animals such as mussels in the tide pools. Mussels are protected by hard shells. When food passes by, a mussel opens its shell to eat. It closes its shell when danger comes around the corner. Hungry sea stars will hit a mussel, hoping to find a way into its shell. Crabs search for dead plants and animals while keeping away from seagulls(海鸥).
In fact, life in a tide pool is also an adventure(冒险) like humans.
()21. Which of the following sentences can be put in the blank “▲”?
A. The tide can also bring in food for the animals.
B. They sometimes face hungry meat-eating animals.
C. They even have less food to feed on.
D. The danger may come around the corner.
()22. What may a mussel do when food passes by?
A. Find a way to run. B. Keep its shell closed.
C. Open its shell to eat. D. Search for dead plants.
()23. When a sea star meets the mussels, what may happen next?
A. A crab would find a way into mussels' shells.
B. Seagulls would search for the mussels.
C. The sea star would eat the mussels.
D. The mussels would open their shells.
()24. What's the RIGHT structure of the passage? (①=Paragraph 1, ②=Paragraph 2...)
A. ①②/③④ B. ①/②③/④ C. ①②/③/④ D. ①/②③④
()25. What can we infer from the last paragraph?
A. Only animals may face adventures in life.
B. The animals in tide pools can't live without water.
C. Humans needn't face an adventure in life.
D. Life is always full of adventures.
答案
【文章大意】本文是一篇说明文，主要介绍了什么是潮汐及潮汐涨落对海洋生物的影响。
21. A 补全文章题。根据第二段“When the tide is high, animals in tide pools... wash the meat - eating animals away too.”可知，本段介绍了涨潮的作用：这可以保护它们免受强烈阳光的伤害，也可以把食肉动物冲走。故空处也是介绍涨潮的作用，选项 A“潮水还可以为动物带来食物。”与上下文相衔接。故选 A。
22. C 细节理解题。根据第三段“When food passes by, a mussel opens its shell to eat.”可知，当食物经过时，贻贝会打开它的壳吃掉食物。故选 C。
23. C 推理判断题。根据第三段“Hungry sea stars will hit a mussel, hoping to find a way into its shell.”可知，饥饿的海星会攻击贻贝，希望能找到进入贻贝的方法。故推断出，当海星看到贻贝时，它会吃掉贻贝。故选 C。
24. B 篇章结构题。第一段总述了潮汐涨落对海洋生物的影响；第二、三段具体介绍了一些海洋生物是如何受到潮汐涨落影响的；第四段总结了动物在潮汐池中的生活也和人类一样是一种冒险。故结构为总——分——总，即①/②③/④。故选 B。
25. D 推理判断题。根据最后一段“In fact, life in a tide pool is also an adventure like humans.”可知，动物在潮汐池中的生活也和人类的生活一样是一种冒险。概括来说，生活总是充满冒险。故选 D。
21. A 补全文章题。根据第二段“When the tide is high, animals in tide pools... wash the meat - eating animals away too.”可知，本段介绍了涨潮的作用：这可以保护它们免受强烈阳光的伤害，也可以把食肉动物冲走。故空处也是介绍涨潮的作用，选项 A“潮水还可以为动物带来食物。”与上下文相衔接。故选 A。
22. C 细节理解题。根据第三段“When food passes by, a mussel opens its shell to eat.”可知，当食物经过时，贻贝会打开它的壳吃掉食物。故选 C。
23. C 推理判断题。根据第三段“Hungry sea stars will hit a mussel, hoping to find a way into its shell.”可知，饥饿的海星会攻击贻贝，希望能找到进入贻贝的方法。故推断出，当海星看到贻贝时，它会吃掉贻贝。故选 C。
24. B 篇章结构题。第一段总述了潮汐涨落对海洋生物的影响；第二、三段具体介绍了一些海洋生物是如何受到潮汐涨落影响的；第四段总结了动物在潮汐池中的生活也和人类一样是一种冒险。故结构为总——分——总，即①/②③/④。故选 B。
25. D 推理判断题。根据最后一段“In fact, life in a tide pool is also an adventure like humans.”可知，动物在潮汐池中的生活也和人类的生活一样是一种冒险。概括来说，生活总是充满冒险。故选 D。
解析
【分析】
拿到这篇科普说明文阅读，首先先通读全文理清核心内容：文章围绕潮汐、潮汐池的形成，以及潮汐池里的生物如何适应潮汐涨落展开介绍。接下来逐个对应题目思考：
1. 第21题是句子补全题，要观察上下文的并列逻辑，前文说涨潮能保护生物不被强光照射，后文说潮水还能冲走食肉动物，空缺处必然也是介绍涨潮对生物的积极作用，顺着这个方向匹配选项就能选出答案。
2. 第22题是纯细节题，直接带着题干关键词“mussel”“food passes by”回文定位，找到对应原文就能直接锁定答案。
3. 第23题是推理题，结合原文描述海星的行为，联系常识中海星以贝类为食的特点，就能合理推断出海星的目的。
4. 第24题是篇章结构题，只需要逐段归纳每段的作用，区分总起段、分述段、总结段，就能快速划分结构。
5. 第25题是主旨推断题，紧扣最后一段的核心句，排除和原文矛盾的干扰项，就能得到正确结论。
【解析】
21. 根据第二段内容，空缺前后都在介绍涨潮的好处：涨潮可以保护潮汐池生物不被强烈的阳光伤害，还能把食肉动物冲走，空缺处需要填入同样属于涨潮积极作用的内容。A选项“潮水也可以为动物带来食物”完全符合并列逻辑，其余选项都在描述危险，和上下文介绍涨潮益处的语境矛盾，因此选A。
22. 直接回文定位第三段原文“When food passes by, a mussel opens its shell to eat”，可以直接对应到“食物经过时，贻贝会张开壳进食”的描述，对应选项C，因此选C。
23. 根据第三段原文“Hungry sea stars will hit a mussel, hoping to find a way into its shell”，饥饿的海星主动攻击贻贝、想要钻进贻贝壳，目的就是捕食贻贝，可推断出海星会吃掉贻贝，其余选项的主体螃蟹、海鸥都和题干中海星遇到贻贝的场景无关，因此选C。
24. 逐段分析段落作用：第1段总起，介绍潮汐的定义、潮汐池的由来，点明潮汐池生物需要适应环境变化；第2、3段分述，分别具体介绍涨潮、落潮两种状态下潮汐池生物的不同生存情况；第4段总结，点明潮汐池的生活和人类生活一样是冒险。整体是总-分-总结构，对应划分方式为①/②③/④，因此选B。
25. 根据最后一段“life in a tide pool is also an adventure like humans”，说明潮汐池生物的生活和人类的生活一样都属于冒险，可推断出生活总是充满冒险。A选项“只有动物面对生活冒险”、C选项“人类不需要面对生活冒险”都和原文直接矛盾，B选项属于无中生有的内容，因此选D。
【答案】
21.A 22.C 23.C 24.B 25.D
【知识点】
细节查找阅读，推理判断阅读，篇章结构分析
【点评】
本题属于中等难度的科普类阅读，考点覆盖了阅读常见的题型，学生解题时要注意优先梳理文章整体行文逻辑，做细节类题目时精准回文定位原文，不要凭自己的主观印象选答案，做篇章结构题时逐段归纳段落大意就能快速排除错误划分方式。
【难度系数】
0.7
拿到这篇科普说明文阅读，首先先通读全文理清核心内容：文章围绕潮汐、潮汐池的形成，以及潮汐池里的生物如何适应潮汐涨落展开介绍。接下来逐个对应题目思考：
1. 第21题是句子补全题，要观察上下文的并列逻辑，前文说涨潮能保护生物不被强光照射，后文说潮水还能冲走食肉动物，空缺处必然也是介绍涨潮对生物的积极作用，顺着这个方向匹配选项就能选出答案。
2. 第22题是纯细节题，直接带着题干关键词“mussel”“food passes by”回文定位，找到对应原文就能直接锁定答案。
3. 第23题是推理题，结合原文描述海星的行为，联系常识中海星以贝类为食的特点，就能合理推断出海星的目的。
4. 第24题是篇章结构题，只需要逐段归纳每段的作用，区分总起段、分述段、总结段，就能快速划分结构。
5. 第25题是主旨推断题，紧扣最后一段的核心句，排除和原文矛盾的干扰项，就能得到正确结论。
【解析】
21. 根据第二段内容，空缺前后都在介绍涨潮的好处：涨潮可以保护潮汐池生物不被强烈的阳光伤害，还能把食肉动物冲走，空缺处需要填入同样属于涨潮积极作用的内容。A选项“潮水也可以为动物带来食物”完全符合并列逻辑，其余选项都在描述危险，和上下文介绍涨潮益处的语境矛盾，因此选A。
22. 直接回文定位第三段原文“When food passes by, a mussel opens its shell to eat”，可以直接对应到“食物经过时，贻贝会张开壳进食”的描述，对应选项C，因此选C。
23. 根据第三段原文“Hungry sea stars will hit a mussel, hoping to find a way into its shell”，饥饿的海星主动攻击贻贝、想要钻进贻贝壳，目的就是捕食贻贝，可推断出海星会吃掉贻贝，其余选项的主体螃蟹、海鸥都和题干中海星遇到贻贝的场景无关，因此选C。
24. 逐段分析段落作用：第1段总起，介绍潮汐的定义、潮汐池的由来，点明潮汐池生物需要适应环境变化；第2、3段分述，分别具体介绍涨潮、落潮两种状态下潮汐池生物的不同生存情况；第4段总结，点明潮汐池的生活和人类生活一样是冒险。整体是总-分-总结构，对应划分方式为①/②③/④，因此选B。
25. 根据最后一段“life in a tide pool is also an adventure like humans”，说明潮汐池生物的生活和人类的生活一样都属于冒险，可推断出生活总是充满冒险。A选项“只有动物面对生活冒险”、C选项“人类不需要面对生活冒险”都和原文直接矛盾，B选项属于无中生有的内容，因此选D。
【答案】
21.A 22.C 23.C 24.B 25.D
【知识点】
细节查找阅读，推理判断阅读，篇章结构分析
【点评】
本题属于中等难度的科普类阅读，考点覆盖了阅读常见的题型，学生解题时要注意优先梳理文章整体行文逻辑，做细节类题目时精准回文定位原文，不要凭自己的主观印象选答案，做篇章结构题时逐段归纳段落大意就能快速排除错误划分方式。
【难度系数】
0.7
