登录
B
Green Journey | Animals
Polar Bears in a Warming World
We use fuel for energy, but it is making the climate warmer. As a result, the ice melts, and the sea level rises. It is bad news for polar bears!
Polar bears live in the cold Arctic. The frozen Arctic is home and the ice is their hunting ground. A polar bear usually stands on the sea ice to hunt for seals when they come up for air. But the ice has started to melt earlier each year. As the ice melts, some polar bears have lost their homes. Homeless polar bears have to move from ice to land earlier and stay on land longer. They starve because they can’t find enough food.
These changes are a result of global warming. Global warming is making life difficult for polar bears. Their future is in our hands. We mustn’t let them down. Let’s save polar bears before it’s too late.
(
A. Global warming is making our life difficult.
B. Using too much fuel can cause global warming.
C. Polar bears are in danger because of global warming.
D. The ice in the Arctic melts earlier because of global warming.
(
A. They break the sea ice to find seals.
B. They wait on the ice for seals to appear.
C. They swim underwater to pull seals.
D. They produce special sounds to get seals.
(
A. Get sick.
B. Feel cold.
C. Lose home.
D. Become hungry.
(
A. To explain how the climate changes.
B. To introduce what global warming is.
C. To call for help to protect polar bears.
D. To invite people to travel to the Arctic.
Green Journey | Animals
Polar Bears in a Warming World
We use fuel for energy, but it is making the climate warmer. As a result, the ice melts, and the sea level rises. It is bad news for polar bears!
Polar bears live in the cold Arctic. The frozen Arctic is home and the ice is their hunting ground. A polar bear usually stands on the sea ice to hunt for seals when they come up for air. But the ice has started to melt earlier each year. As the ice melts, some polar bears have lost their homes. Homeless polar bears have to move from ice to land earlier and stay on land longer. They starve because they can’t find enough food.
These changes are a result of global warming. Global warming is making life difficult for polar bears. Their future is in our hands. We mustn’t let them down. Let’s save polar bears before it’s too late.
(
C
)19. What is the main idea of the text?A. Global warming is making our life difficult.
B. Using too much fuel can cause global warming.
C. Polar bears are in danger because of global warming.
D. The ice in the Arctic melts earlier because of global warming.
(
B
)20. How do polar bears hunt seals?A. They break the sea ice to find seals.
B. They wait on the ice for seals to appear.
C. They swim underwater to pull seals.
D. They produce special sounds to get seals.
(
D
)21. What does the underlined word “starve” in Paragraph 2 probably mean?A. Get sick.
B. Feel cold.
C. Lose home.
D. Become hungry.
(
C
)22. What is the writer’s purpose of writing the text?A. To explain how the climate changes.
B. To introduce what global warming is.
C. To call for help to protect polar bears.
D. To invite people to travel to the Arctic.
答案
19.C 20.B 21.D 22.C
解析
【分析】
首先通读全文，明确文章核心：围绕全球变暖导致北极冰融化，威胁北极熊生存展开，最终呼吁保护北极熊。针对各小题，需定位原文对应信息，结合题型特点解题：19题为主旨题，需总结全文核心；20题为细节题，找原文关于北极熊捕猎的描述；21题为词义猜测题，结合上下文语境推断词义；22题为写作目的题，关注文末作者的呼吁。
【解析】
19题：主旨大意题。文章先说明燃料使用引发气候变暖，北极冰融化，再阐述北极熊依赖冰生存，冰融化后无家可归、缺食物，最后点明是全球变暖导致并呼吁保护北极熊。A选项偏离“北极熊受威胁”的核心；B选项仅提及燃料致变暖，片面；D选项仅说冰融化，未涉及北极熊；C选项准确概括主旨，故选C。
20题：细节理解题。根据原文第二段“A polar bear usually stands on the sea ice to hunt for seals when they come up for air”，可知北极熊在冰上等待海豹浮出水面捕猎，对应B选项。A、C、D选项原文未提及，排除。
21题：词义猜测题。所在句前文提到北极熊待在陆地更久，找不到足够食物，因此starve意为“挨饿，变得饥饿”，对应D选项。A生病、B寒冷、C失去家园均不符合语境，排除。
22题：推理判断题。文末“Let’s save polar bears before it’s too late”明确表达作者呼吁保护北极熊的目的，A、B、D选项均不符，故选C。
【答案】
19.C 20.B 21.D 22.C
【知识点】
主旨大意题、细节理解题、词义猜测题、推理判断题
【点评】
本文是环保与动物保护主题的阅读理解题，考查学生对文章多维度信息的理解能力，需结合原文定位细节、推断主旨与作者意图，难度适中。
【难度系数】
0.3
首先通读全文，明确文章核心：围绕全球变暖导致北极冰融化，威胁北极熊生存展开，最终呼吁保护北极熊。针对各小题，需定位原文对应信息，结合题型特点解题：19题为主旨题，需总结全文核心；20题为细节题，找原文关于北极熊捕猎的描述；21题为词义猜测题，结合上下文语境推断词义；22题为写作目的题，关注文末作者的呼吁。
【解析】
19题：主旨大意题。文章先说明燃料使用引发气候变暖，北极冰融化，再阐述北极熊依赖冰生存，冰融化后无家可归、缺食物，最后点明是全球变暖导致并呼吁保护北极熊。A选项偏离“北极熊受威胁”的核心；B选项仅提及燃料致变暖，片面；D选项仅说冰融化，未涉及北极熊；C选项准确概括主旨，故选C。
20题：细节理解题。根据原文第二段“A polar bear usually stands on the sea ice to hunt for seals when they come up for air”，可知北极熊在冰上等待海豹浮出水面捕猎，对应B选项。A、C、D选项原文未提及，排除。
21题：词义猜测题。所在句前文提到北极熊待在陆地更久，找不到足够食物，因此starve意为“挨饿，变得饥饿”，对应D选项。A生病、B寒冷、C失去家园均不符合语境，排除。
22题：推理判断题。文末“Let’s save polar bears before it’s too late”明确表达作者呼吁保护北极熊的目的，A、B、D选项均不符，故选C。
【答案】
19.C 20.B 21.D 22.C
【知识点】
主旨大意题、细节理解题、词义猜测题、推理判断题
【点评】
本文是环保与动物保护主题的阅读理解题，考查学生对文章多维度信息的理解能力，需结合原文定位细节、推断主旨与作者意图，难度适中。
【难度系数】
0.3
