2024年3月16日发(作者：代芮美)
手惰市安逸阳光实验学校课时跟踪练30 Unit 5 The
power of nature
Ⅰ.阅读理解
A
If humans pump enough carbon dioxide(CO
2
)into the atmosphere，
stratocumulus clouds(层积云)could disappear，and the Earth's
temperature could climb sharply to heights not predicted in current
climate would burn the 's the conclusion of a paper
published in the journal
Nature
Geoscience
and described in detail by
Natalie Wolchover for
Quanta
Magazine
.
As Wolchover explained，clouds have long been one of the great
uncertainties of climate er models that easily capture the
complexity and detail of most climate systems just aren't powerful enough
to predict worldwide changes in the behaviour of clouds are
reflect sunlight away from the Earth's
stratocumulus clouds are those white blankets you might have
seen as you look out the window of the airplane，rolling out below you
and hiding the chers suspect that certain sudden jumps in
temperature may have been caused by changes to clouds like these.
For the new research，scientists modeled just a small patch of sky
using a found that if carbon dioxide levels reach
about 1，200 parts per million(ppm)in the atmosphere，stratocumulus
clouds will break 's a very high carbon dioxide
now，levels have climbed past 410 ppm—a dangerous
change from 280 ppm before the Industrial Revolution.
But humans put more and more CO
2
into the atmosphere every
current trends continue，the Earth could reach 1，200 ppm within 100 to
150 could happen if our society doesn't follow through on any
of its commitments to reduce emissions(排放物)，Wolchover
even if it does，the result would be another 8 degrees Celsius of heat
added to the global an average，on top of the dangerous changes already
underway due to greenhouse gases.
That's an enormous change，and it goes beyond predictions of
worldwide ice melt and catastrophic sea level ，once
stratocumulus clouds are gone，Wolchover reported，they likely wouldn't
reappear until atmospheric carbon dioxide levels dropped below where
they are currently.
There's still some uncertainty in the 1，200 ppm figure could
change as scientists look into the issue further.
1．What can we learn from Paragraph 2?
A．Most climate systems are not complex.
B．The behaviour of clouds is uncertain and hard to predict.
C．Temperature changes affect stratocumulus clouds.
D．The stratocumulus clouds protect planes from sunlight.
2．What does “it”refer to in Paragraph 4?
A．The atmosphere. B．The earth.
C．Our society. D．The result.
3．Which of the following statements would Wolchover most probably
agree with ?
A．The effects of CO
2
emissions have been fully assessed.
B．Stratocumulus clouds won't return if they are gone.
C．The breakup of stratocumulus clouds could result in catastrophes.
D．Once CO
2
level reaches 1，200 ppm，stratocumulus clouds will go
extinct.
【语篇解读】 本文主要介绍了人类如果继续向大气中排放二氧化碳可能
造成的后果及原因。
1．解析：细节理解题。根据第二段中的“...clouds have long been one
of the great uncertainties of climate er models that easily
capture the complexity and detail of most climate systems just aren't
powerful enough to predict worldwide changes in the behaviour of
clouds.”可知，长期以来，云层一直是气候模式中很不确定的因素之一。轻易
捕捉到大多数气候系统的复杂性和细节的计算机模型不够强大，无法预测世界
范围内云雾状态的变化。由此可知，云雾状态是不确定的，很难预测。故选B
项。
答案：B
2．解析：词义猜测题。根据画线词前一句中的“This could happen if our
society doesn't follow through on any of its commitments to reduce
emissions”可知，如果我们的社会不遵守减少排放物的承诺，在100到150
年内地球二氧化碳的含量可能达到百万分之一千二。even if it does是对our
society doesn't 的一种让步情况，由此推知，it在此处
指代our society，此处表示即使我们的社会遵守减少排放物的承诺，结果将
是全球平均气温也会再增加8摄氏度。故选C项。
答案：C
3．解析：推理判断题。根据第三段中的“They found that if carbon dioxide
2024年3月16日发(作者：代芮美)
手惰市安逸阳光实验学校课时跟踪练30 Unit 5 The
power of nature
Ⅰ.阅读理解
A
If humans pump enough carbon dioxide(CO
2
)into the atmosphere，
stratocumulus clouds(层积云)could disappear，and the Earth's
temperature could climb sharply to heights not predicted in current
climate would burn the 's the conclusion of a paper
published in the journal
Nature
Geoscience
and described in detail by
Natalie Wolchover for
Quanta
Magazine
.
As Wolchover explained，clouds have long been one of the great
uncertainties of climate er models that easily capture the
complexity and detail of most climate systems just aren't powerful enough
to predict worldwide changes in the behaviour of clouds are
reflect sunlight away from the Earth's
stratocumulus clouds are those white blankets you might have
seen as you look out the window of the airplane，rolling out below you
and hiding the chers suspect that certain sudden jumps in
temperature may have been caused by changes to clouds like these.
For the new research，scientists modeled just a small patch of sky
using a found that if carbon dioxide levels reach
about 1，200 parts per million(ppm)in the atmosphere，stratocumulus
clouds will break 's a very high carbon dioxide
now，levels have climbed past 410 ppm—a dangerous
change from 280 ppm before the Industrial Revolution.
But humans put more and more CO
2
into the atmosphere every
current trends continue，the Earth could reach 1，200 ppm within 100 to
150 could happen if our society doesn't follow through on any
of its commitments to reduce emissions(排放物)，Wolchover
even if it does，the result would be another 8 degrees Celsius of heat
added to the global an average，on top of the dangerous changes already
underway due to greenhouse gases.
That's an enormous change，and it goes beyond predictions of
worldwide ice melt and catastrophic sea level ，once
stratocumulus clouds are gone，Wolchover reported，they likely wouldn't
reappear until atmospheric carbon dioxide levels dropped below where
they are currently.
There's still some uncertainty in the 1，200 ppm figure could
change as scientists look into the issue further.
1．What can we learn from Paragraph 2?
A．Most climate systems are not complex.
B．The behaviour of clouds is uncertain and hard to predict.
C．Temperature changes affect stratocumulus clouds.
D．The stratocumulus clouds protect planes from sunlight.
2．What does “it”refer to in Paragraph 4?
A．The atmosphere. B．The earth.
C．Our society. D．The result.
3．Which of the following statements would Wolchover most probably
agree with ?
A．The effects of CO
2
emissions have been fully assessed.
B．Stratocumulus clouds won't return if they are gone.
C．The breakup of stratocumulus clouds could result in catastrophes.
D．Once CO
2
level reaches 1，200 ppm，stratocumulus clouds will go
extinct.
【语篇解读】 本文主要介绍了人类如果继续向大气中排放二氧化碳可能
造成的后果及原因。
1．解析：细节理解题。根据第二段中的“...clouds have long been one
of the great uncertainties of climate er models that easily
capture the complexity and detail of most climate systems just aren't
powerful enough to predict worldwide changes in the behaviour of
clouds.”可知，长期以来，云层一直是气候模式中很不确定的因素之一。轻易
捕捉到大多数气候系统的复杂性和细节的计算机模型不够强大，无法预测世界
范围内云雾状态的变化。由此可知，云雾状态是不确定的，很难预测。故选B
项。
答案：B
2．解析：词义猜测题。根据画线词前一句中的“This could happen if our
society doesn't follow through on any of its commitments to reduce
emissions”可知，如果我们的社会不遵守减少排放物的承诺，在100到150
年内地球二氧化碳的含量可能达到百万分之一千二。even if it does是对our
society doesn't 的一种让步情况，由此推知，it在此处
指代our society，此处表示即使我们的社会遵守减少排放物的承诺，结果将
是全球平均气温也会再增加8摄氏度。故选C项。
答案：C
3．解析：推理判断题。根据第三段中的“They found that if carbon dioxide