必修第一册 Unit 6 At one with nature 课后检测能力达标（教用Word）-【精微方案】2027年高考一轮总复习讲义·英语（外研版）

 

Ⅰ.阅读理解

A

(2026·温州二模)A dropped bag of chips disturbed a cave ecosystem in Carlsbad Caverns National Park, New Mexico. This cave is almost cut off from the outside world, so introducing anything foreign can be harmful. “Things in the damp cave get wet quickly，”says park guide Ashley. The snack attracts tiny organisms, causing unwanted growth. Soon, small animals like crickets and spiders came to eat, spreading the pollution. Rangers found the bag within hours.“But that can be all it takes，”says Ashley. “I'm sure some crickets got a bit of the snack.”

Over 500 million people visit American public lands each year, creating many chances to harm wild places. “When you look at the numbers, it's incredible，” says Watts, head of the Leave No Trace Center for Outdoor Ethic in Colorado, an organization aimed at minimizing human impact on nature.

Food waste takes a long time to break down, especially in certain areas. “It takes much longer for an apple core to rot in a desert than in a forest，” says Blye, a teacher at the University of Utah. Leaving waste introduces animals to an unnatural diet and changes their behavior with sometimes disastrous results. Bears who taste garbage and become a threat to humans may have to be put down. “Bears can get used to unnatural food in three weeks，” says Watts.“Everyone loses in this case.”

Biological waste is also problematic. Dog waste brings new bacteria into the ecosystem and scares away deer. Meanwhile, human waste and toilet paper introduce dangerous bacteria into water sources.

In national parks, trails (小路) are designed to avoid sensitive areas.

Stepping off the trail, even for a quick photo, can scare wildlife away. Impacts from many visitors result in long-term damage to nature and wildlife. But people don't think of that when they see the perfect photo opportunity. “It's just such a hard thing to resist，” says Blye. The risk to sensitive ecosystems isn't obvious. “It's easy to think, oh, there are wild flowers over there. I shouldn't step on them，” says Blye, but these tiny ecosystems full of microscopic organisms essential to desert life provide many benefits, including reducing the risk of erosion and helping absorb rainfall, and can take hundreds of years to return to its original state.

【解题导语】　本文是一篇说明文。文章介绍了游客在自然保护区的不当行为对自然环境造成的负面影响。

1．What does Ashley mean by the underlined “But that can be all it takes”？

A.The rangers' work is efficient.

B.The damage has been done.

C.The cleanup takes a long time.

D.The pollution has spread widely.

B　解析：句意猜测题。根据画线句上文“A dropped bag of chips...can be harmful.”以及“Soon，small animals... spreading the pollution.”可知，虽然护林员在几小时内就发现了薯片，但是损害已经造成了。

2．What is a result of foreign waste in public lands?

A.A shift in animal behavior.

B.A shortage of food supplies.

C.A decline in bacterial species.

D.An increase in regional conflicts.

A　解析：细节理解题。根据第三段中的“Leaving waste...disastrous results.”可知，留下外来垃圾会改变动物的行为。

3．Why does the writer mention wild flowers in paragraph 5?

A.To praise their benefits to desert life.

B.To highlight our damage to ecosystems.

C.To stress their significance for photography.

D.To show our unawareness of nature's sensitivity.

D　解析：推理判断题。根据第五段内容可知，人们容易意识到不应该踩野花，但是对于微小生态系统的敏感性缺乏认识。由此可推知，提到野花是为了通过对比，显示出人们对大自然敏感性的认识不足。

4．According to this passage, what should we do when traveling?

A.Encourage wildlife protection.

B.Leave no trace in the wild.

C.Promote national park tourism.

D.Restore ecological damage.

B　解析：推理判断题。通读全文可知，文章通过“薯片袋污染”“垃圾改变动物行为”“游客踩踏敏感区域”等案例，强调了“不留痕迹”的必要性。

B

(2026·豫西北教研联盟高三质检)Artificial intelligence (AI) is being applied to help save the UK's endangered red squirrels (松鼠).The groundbreaking technology, known as Squirrel Agent, has been trained to spot the difference between red and grey squirrels in order to manage feeders meant for red squirrels and ultimately, control populations.

The UK's only native squirrel species, reds have been under threat since the introduction of greys from North America in the late 19th century.Today, greys are thought to number some 2.7 million versus only a few hundred thousand reds.This is largely because greys are bigger, outcompeting reds for food and territory, and carry squirrelpox, a disease deadly to reds.Collectively, these pressures have pushed red squirrels to the edge of extinction.

Squirrel Agent, which claims a 97 per cent accuracy rate, recognises reds by their size, shape and weight, and features such as tails, faces and ears.Feeders are then remotely opened for reds or, for greys, kept closed, instead opening traps or encouraging them to consume pills aimed at birth control.

“It's a real showcase of what AI can do—it's working in real time to