9 必修第三册 Unit 1 Nature in the balance（配套练习Word版）-【创新教程】2027年高考英语总复习大一轮课时作业（译林版）

[必修第三册]

课时冲关9　Unit 1　Nature in the balance

Stephen Warren, study leader at the University of Washington has been on the case of the green icebergs for more than 30 years. He first took samples from one of these green hunks of ice in 1988, near the Amery Ice Shelf, East Antarctic. Most glacial ice occurs in shades of white to brilliant blue. The bluer the ice, the older it is. Typically, compression (压缩) from accumulating layers of snow pushes air bubbles out of the ice, reducing the scattering of white light. The compressed ice absorbs most of the light except for blue，creating the blue color seen in the hearts of icebergs and glaciers.

The green ice was similarly bubble­free, and yet it looked green instead of blue. Warren and his team soon found that the green ice came not from glaciers, but from marine ice. That's the ice from the undersides of floating ice shelves.

At first, the team thought that organic material in the marine ice was causing the green color. But further research showed that the green marine ice didn't have a higher­than­usual amount of organic impurities. Now, a new study finds that a different sort of impurity may be the root cause of the green ice. Warren and his colleagues report that the marine ice at the bottom of the Amery Ice Shell has 500 times more iron than the glacial ice above.

This iron comes from the rocks under the Antarctic Ice Sheet, which are turned into fine powder as glaciers move over them. The icebound iron oxidizes (氧化) as it contacts seawater. The resulting iron oxide particles take on a green color when light scatters through them. When icebergs break off the larger ice shelf, they carry this iron­rich ice with them. It's like taking a package to the post office. The iceberg can deliver this iron into the ocean far away, and then melt and deliver it to other living things that can use it as a nutrient.

1．What's special about the iceberg found by Warren?

A．The iceberg was old.

B．The iceberg absorbed blue light.

C．The iceberg's heart was pure white.

D．The iceberg was bubble­free and green.

2．What's the actual reason for the green color of some Antarctic icebergs?

A．Iron dust from marine ice.

B．Impurities of marine ice.

C．Reflection of green plants.

D．Compression from layers of snow.

3．What's the function of the iron mentioned in the last paragraph?

A．Deliver the package.

B．Oxidize the seawater.

C．Bring marine life nutrients.

D．Break off the large ice shelf.

4．What is the text mainly about?

A．A study about Antarctic.

B．The colors of icebergs.

C．The movement of icebergs.

D．The mystery of green icebergs.

[语篇解读]　本文是一篇说明文。主要讲述了华盛顿大学的Stephen Warren带领自己的团队揭开了绿色冰山的形成之谜。

1．D　[细节理解题。根据第二段中的“The green ice was similarly bubble­free, and yet it looked green instead of blue.(绿色的冰同样没有气泡，但它看起来是绿色的，而不是蓝色的。)”可知，Warren发现的冰山没有气泡且呈绿色。]

2．A　[细节理解题。根据最后一段中的“This iron comes from the rocks under the Antarctic Ice Sheet, which are turned into fine powder as glaciers move over them. The icebound iron oxidizes (氧化) as it contacts seawater. The resulting iron oxide particles take on a green color when light scatters through them.(这些铁来自南极冰盖下的岩石，当冰川在其上移动时，这些岩石会变成细粉末。冰封的铁在接触海水时会氧化。当光散射穿过所产生的铁氧化物颗粒时，其呈现绿色。)”可知，海冰中的铁屑是一些冰山呈绿色的真正原因。]

3．C　[细节理解题。根据最后一段中的“The iceberg can deliver this iron into the ocean far away, and then melt and deliver it to other living things that can use it as a nutrient.(冰山可以将这些铁输送到遥远的海洋中，然后融化并将铁输送给其他可以将其用作营养物质的生物。)”可知，冰山中的铁最终会被输送给其他生物，当作它们的营养物质。]

4．D　[主旨大意题。通读全文可知，第一段讲述了Stephen Warren研究绿色冰山30多年以及通常情况下冰的颜色；第二段介绍了绿色冰的特点以及Stephen Warren及其团队发现了其产生地点；最后两段讲述了Stephen Warren及其团队解开冰呈绿色之谜的经过以及绿色冰山的形成原理。由此可推测出，本文围绕Stephen Warren带领自己的团队揭开了绿色冰山的形成之谜展开，所以D项“绿色冰山之谜”最符合题意。]

(2024·河北石家庄高三强化练习)Most people associate space with silence. But the story of how we came to understand the universe is just as much a story of listening as it is by looking. And yet despite this, hardly any of us has ever heard space. How many of you could describe the sound

of a single planet or star?

And you may wonder: How do we know what these sounds are? How can we tell the difference between the sound of the sun and the sound of a pulsar (脉冲星)? Well, the answer is the science of radio astronomy. Radio astronomers study radio waves from space using sensitive antennas (天线) and receivers, which give them precise information about what an astronomical object is and where it is in our night sky. And just like the signals that we send and receive here on earth, we can convert these transmissions into sound using simple analog techniques (模拟技术). And therefore, it's through listening that we've come to uncover some of the universe's most important secrets—its scale, what it's made of and even how old it is.

In 1876, Alexander Graham Bell worked with Thomas Watson on the invention of the telephone. A key part of their technical set­up was a half­mile long length of wire, which was thrown across the rooftops of several houses in Boston. The line carried the telephone signals that would later make Bell a household name. But like any long length of charged wire, it also inadvertently became an antenna. Thomas Watson spent hours listening to the strange crackles and hisses and whistles that his accidental antenna detected...

As he correctly guessed, some of these sounds were caused by activity on the surface of the sun. So while inventing the technology that would usher in the telecommunications revolution, Watson had discovered that the star at the center of our solar system emitted (发射) powerful radio waves.

5．How do the radio astronomers discover the universe's secrets?

A．By watching.　　 B．By calculating.

C．By listening.  D．By measuring.

6．What does the underlined word “inadvertently” in the third paragraph mean?

A．By chance.  B．On purpose.

C．In surprise.  D．On average.

7．What did Thomas Watson discover from the solar system's star?

A．Antennas and receivers.

B．Telephone signals.

C．Activities of the sun.

D．Radio waves.

8．From what kind of magazine can we read this text?

A．Society.  B．Nature.

C．Culture.  D．Entertainment.

[语篇解读]　本文是一篇说明文。文章主要介绍了宇宙声音的来源。