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C
The idea "humans are made from stardust(star-made material)" was first brought to the public in the 1980s by the astronomer(天文学家) Car Sagan. It might seem mysterious. But Car explained the science behind it.
Long time ago, the Big Bang(大爆炸) created hydrogen(氢) and helium(氦). These lighter elements(元素) were turned into heavier ones like carbon(碳) and oxygen(氧) through nuclear fusion(核聚变) caused by some stars. Such stars that helped produce new elements were called "element factories". When the stars died, those elements were spread across space. Over time, they went together and formed new stars, planets, and ... humans!
Car said we humans could be a walking museum. The carbon in our cells, the oxygen we breathe, the iron in our blood, and even the calcium(钙) in our bones were once part of a star billions of years ago. Our left hand might have atoms(原子) from a red star while our right hand could have the atoms from a blue one! Oxygen atoms in the water we are drinking might be older than the Earth. How about the pizza we are eating? The carbon in it could be "stardust" 4.5 billion years ago. Every atom in us is like a tiny time capsule(胶囊) with an unbelievable space story. ★
The fact is that everything around us—the trees in our schoolyard, the animals on our farm, even our smartphones—is made of "stardust". So next time when we look at the night sky, we should remember: The star Sirius(天狼星) might have donated some of our oxygen. The Orion Nebula(猎户座) could be the "birthplace" of your calcium. That shining light might be our atomic cousin! And we're not just on Earth—we are in space! That is what's called family ties.
(
A. they created H and He
B. they helped produce new elements
$C. they turned into C and O_2$
D. they caused the Big Bang
(
A. To explain why we eat space food.
B. To tell a story that happened long time ago.
C. To describe how much carbon is in the pizza.
D. To show that even food has "stardust" in it.
(
A. We need to learn about medicine.
B. Humans know the Earth a lot.
C. We're carrying the space's history.
D. Space has changed greatly.
(
A. Stars offer humans light.
B. Humans are protected by stars.
C. Stars are connected with humans.
D. Humans have discovered most stars.
(
A. [图]
B.
C. [图]
D. [图]
The idea "humans are made from stardust(star-made material)" was first brought to the public in the 1980s by the astronomer(天文学家) Car Sagan. It might seem mysterious. But Car explained the science behind it.
Long time ago, the Big Bang(大爆炸) created hydrogen(氢) and helium(氦). These lighter elements(元素) were turned into heavier ones like carbon(碳) and oxygen(氧) through nuclear fusion(核聚变) caused by some stars. Such stars that helped produce new elements were called "element factories". When the stars died, those elements were spread across space. Over time, they went together and formed new stars, planets, and ... humans!
Car said we humans could be a walking museum. The carbon in our cells, the oxygen we breathe, the iron in our blood, and even the calcium(钙) in our bones were once part of a star billions of years ago. Our left hand might have atoms(原子) from a red star while our right hand could have the atoms from a blue one! Oxygen atoms in the water we are drinking might be older than the Earth. How about the pizza we are eating? The carbon in it could be "stardust" 4.5 billion years ago. Every atom in us is like a tiny time capsule(胶囊) with an unbelievable space story. ★
The fact is that everything around us—the trees in our schoolyard, the animals on our farm, even our smartphones—is made of "stardust". So next time when we look at the night sky, we should remember: The star Sirius(天狼星) might have donated some of our oxygen. The Orion Nebula(猎户座) could be the "birthplace" of your calcium. That shining light might be our atomic cousin! And we're not just on Earth—we are in space! That is what's called family ties.
(
B
)61. Stars were called "element factories" because .A. they created H and He
B. they helped produce new elements
$C. they turned into C and O_2$
D. they caused the Big Bang
(
D
)62. Why does the writer mention "pizza" in Paragraph 3?A. To explain why we eat space food.
B. To tell a story that happened long time ago.
C. To describe how much carbon is in the pizza.
D. To show that even food has "stardust" in it.
(
C
)63. Which of the following can be put in ?A. We need to learn about medicine.
B. Humans know the Earth a lot.
C. We're carrying the space's history.
D. Space has changed greatly.
(
C
)64. What does the underlined phrase "atomic cousin" suggest?A. Stars offer humans light.
B. Humans are protected by stars.
C. Stars are connected with humans.
D. Humans have discovered most stars.
(
D
)65. Which would be the best theme picture of the passage?A. [图]
B.
C. [图]
D. [图]
答案
61.B 62.D 63.C 64.C 65.D
解析
【分析】这是一篇围绕“人类由星尘构成”展开的科普类阅读理解，共5道题，分别考查细节理解、推理判断、语句衔接、词义猜测和主旨大意（选择主题图片）。解题时需先通读文章把握核心观点，再针对各小题定位原文对应内容，结合选项逐一分析。
【解析】
61. 细节理解题：根据原文第二段“Such stars that helped produce new elements were called 'element factories'.”可知，恒星被称为“元素工厂”是因为它们帮助产生新元素，对应选项B。
62. 细节理解题：第三段提及披萨中的碳也是45亿年前的星尘，举例目的是说明即使食物也含有“星尘”，对应选项D。
63. 语句衔接题：第三段前文提到每个原子是带有太空故事的时间胶囊，后文讲周围万物都是星尘，中间需衔接“我们承载着太空的历史”，对应选项C。
64. 词义猜测题：“atomic cousin”意为“原子层面的表亲”，结合上下文可知是指星星与人类在原子层面存在联系，对应选项C。
65. 主旨大意题：文章核心是人类及万物由星尘构成，与太空、星星相关，D图展现了人与星空的关联，符合主旨，对应选项D。
【答案】61.B 62.D 63.C 64.C 65.D
【知识点】阅读理解（细节理解、推理判断）、词义猜测、主旨大意
【点评】本文为科普类阅读，围绕“星尘构成万物”的观点展开，题目侧重考查学生对文章细节的定位能力、上下文逻辑的理解能力及主旨的把握能力，难度适中。
【难度系数】0.6
【解析】
61. 细节理解题：根据原文第二段“Such stars that helped produce new elements were called 'element factories'.”可知，恒星被称为“元素工厂”是因为它们帮助产生新元素，对应选项B。
62. 细节理解题：第三段提及披萨中的碳也是45亿年前的星尘，举例目的是说明即使食物也含有“星尘”，对应选项D。
63. 语句衔接题：第三段前文提到每个原子是带有太空故事的时间胶囊，后文讲周围万物都是星尘，中间需衔接“我们承载着太空的历史”，对应选项C。
64. 词义猜测题：“atomic cousin”意为“原子层面的表亲”，结合上下文可知是指星星与人类在原子层面存在联系，对应选项C。
65. 主旨大意题：文章核心是人类及万物由星尘构成，与太空、星星相关，D图展现了人与星空的关联，符合主旨，对应选项D。
【答案】61.B 62.D 63.C 64.C 65.D
【知识点】阅读理解（细节理解、推理判断）、词义猜测、主旨大意
【点评】本文为科普类阅读，围绕“星尘构成万物”的观点展开，题目侧重考查学生对文章细节的定位能力、上下文逻辑的理解能力及主旨的把握能力，难度适中。
【难度系数】0.6
