Leia os provérbios:
1. Don't count your chickens before they lay eggs.
2. Don't bite the hand that feeds you.
3. Every cloud has a silver lining.
A alternativa que melhor expressa a ideia contida em cada um dos três provérbios, na ordem em que aparecem, é:
TEXTO PARA A QUESTÃO
As astronomers gaze into the depths of space, they do so with
unease: They don't know precisely what the universe is made of.
Surprisingly, no one knows the stars' exact chemical
composition: how many carbon, nitrogen and oxygen atoms
[5] they have relative to hydrogen, the most common element.
These numbers are crucial, because they affect how stars
live and die, what types of planets form and even how readily
life might arise on other world's.
Twenty years ago, astronomers expressed confidence in the
[10] numbers they had been working with. Now, not so much. The
problem lies not in the far corners of the cosmos, but much
closer to home. Astonishingly, scientists don't know exactly
what the sun is made of. As a result, they don't know what the
other stars are made of, either.
[15] “The sun is a fundamental yardstick,” says Martin Asplund,
an astrophysicist at the Max Planck Institute for Astrophysics, in
Germany. “When we determine the abundance of a certain
element in a star or a galaxy or a gas cloud anywhere in the
universe, we use the sun as a reference point.”
[20] The sun's location in the Milky Way also makes it a good
representative of the entire galaxy. Most stars reside in giant
galaxies like the Milky Way, which makes the sun a touchstone
for the entire cosmos.
For nearly a century, astronomers have judged stars normal
[25] or not by seeing whether their chemical compositions match the
sun's. Most stars near us do; some don't.
Scientific American. 1 July 2020. Adaptado.
Segundo o texto, conhecer a composição de elementos químicos que constituem as estrelas é fundamental, pois ela, entre outros aspectos,
TEXTO PARA A QUESTÃO
As astronomers gaze into the depths of space, they do so with
unease: They don't know precisely what the universe is made of.
Surprisingly, no one knows the stars' exact chemical
composition: how many carbon, nitrogen and oxygen atoms
[5] they have relative to hydrogen, the most common element.
These numbers are crucial, because they affect how stars
live and die, what types of planets form and even how readily
life might arise on other world's.
Twenty years ago, astronomers expressed confidence in the
[10] numbers they had been working with. Now, not so much. The
problem lies not in the far corners of the cosmos, but much
closer to home. Astonishingly, scientists don't know exactly
what the sun is made of. As a result, they don't know what the
other stars are made of, either.
[15] “The sun is a fundamental yardstick,” says Martin Asplund,
an astrophysicist at the Max Planck Institute for Astrophysics, in
Germany. “When we determine the abundance of a certain
element in a star or a galaxy or a gas cloud anywhere in the
universe, we use the sun as a reference point.”
[20] The sun's location in the Milky Way also makes it a good
representative of the entire galaxy. Most stars reside in giant
galaxies like the Milky Way, which makes the sun a touchstone
for the entire cosmos.
For nearly a century, astronomers have judged stars normal
[25] or not by seeing whether their chemical compositions match the
sun's. Most stars near us do; some don't.
Scientific American. 1 July 2020. Adaptado.
No texto, o astrofísico Martin Asplund emprega a frase “The sun is a fundamental yardstick” (L. 15), por considerar o Sol
TEXTO PARA A QUESTÃO
As astronomers gaze into the depths of space, they do so with
unease: They don't know precisely what the universe is made of.
Surprisingly, no one knows the stars' exact chemical
composition: how many carbon, nitrogen and oxygen atoms
[5] they have relative to hydrogen, the most common element.
These numbers are crucial, because they affect how stars
live and die, what types of planets form and even how readily
life might arise on other world's.
Twenty years ago, astronomers expressed confidence in the
[10] numbers they had been working with. Now, not so much. The
problem lies not in the far corners of the cosmos, but much
closer to home. Astonishingly, scientists don't know exactly
what the sun is made of. As a result, they don't know what the
other stars are made of, either.
[15] “The sun is a fundamental yardstick,” says Martin Asplund,
an astrophysicist at the Max Planck Institute for Astrophysics, in
Germany. “When we determine the abundance of a certain
element in a star or a galaxy or a gas cloud anywhere in the
universe, we use the sun as a reference point.”
[20] The sun's location in the Milky Way also makes it a good
representative of the entire galaxy. Most stars reside in giant
galaxies like the Milky Way, which makes the sun a touchstone
for the entire cosmos.
For nearly a century, astronomers have judged stars normal
[25] or not by seeing whether their chemical compositions match the
sun's. Most stars near us do; some don't.
Scientific American. 1 July 2020. Adaptado.
Conforme o texto, um critério tradicionalmente utilizado por astrônomos para avaliar estrelas envolve
TEXTO PARA A QUESTÃO
I knew TikTok existed, but I didn't fully understand what it was until a few months ago. I also realized that something radical, yet largely invisible, is happening on the internet — with implications we still don't understand.
When I was growing up, I took it for granted that the people who became famous enough to be listened to by a crowd had worked hard for that accolade and generally operated with the support of an institution or an established industry.
The idea that I as a teenager in my bedroom, might sudden!y communicate with 100,000 people or more, would have seemed bizarre.
Today's kids no longer see life in these hierarchical and institutional terms. Yes, their physical worlds are often constrained by parental controls, a lack of access to the outdoors and insane over-scheduling.
But despite that (or, more accurately, in reaction to that), they see the internet as a constantly evolving frontier, where it is still possible for a bold and lucky pioneer to grab some land or find a voice. Most voices on the internet never travel beyond a relatively small network, and much of the content that goes viral on platforms such as TikTok, YouTube or Instagram does so because of unseen institutions at work (for example, a public relations team aiming to boost a celebrity's profile).
Fame can suddent!y appear — and then just as suddenly be taken away again, because the audience gets bored, the platform's algorithms change or the cultural trend that a breakout video has tapped into goes out of fashion.
For a teenager, social media can seem like a summer garden at dusk filled with fireflies: spots of lights suddently flare up and then die down, moving in an unpredictable, capricious display.
Is this a bad thing” We will not know for several years.
Financial Times. 5 February 2020. Adaptado.
Conforme o texto, um aspecto associado ao caráter efêmero da popularidade de um usuário da internet, relativo ao uso de plataformas como TikTok, é
TEXTO PARA A QUESTÃO
I knew TikTok existed, but I didn't fully understand what it was until a few months ago. I also realized that something radical, yet largely invisible, is happening on the internet — with implications we still don't understand.
When I was growing up, I took it for granted that the people who became famous enough to be listened to by a crowd had worked hard for that accolade and generally operated with the support of an institution or an established industry.
The idea that I as a teenager in my bedroom, might sudden!y communicate with 100,000 people or more, would have seemed bizarre.
Today's kids no longer see life in these hierarchical and institutional terms. Yes, their physical worlds are often constrained by parental controls, a lack of access to the outdoors and insane over-scheduling.
But despite that (or, more accurately, in reaction to that), they see the internet as a constantly evolving frontier, where it is still possible for a bold and lucky pioneer to grab some land or find a voice. Most voices on the internet never travel beyond a relatively small network, and much of the content that goes viral on platforms such as TikTok, YouTube or Instagram does so because of unseen institutions at work (for example, a public relations team aiming to boost a celebrity's profile).
Fame can suddent!y appear — and then just as suddenly be taken away again, because the audience gets bored, the platform's algorithms change or the cultural trend that a breakout video has tapped into goes out of fashion.
For a teenager, social media can seem like a summer garden at dusk filled with fireflies: spots of lights suddently flare up and then die down, moving in an unpredictable, capricious display.
Is this a bad thing” We will not know for several years.
Financial Times. 5 February 2020. Adaptado.
No texto, a referência a um jardim de verão ao entardecer, repleto de vagalumes, sugere que, para os adolescentes, as mídias sociais