Read this text about Yuri Gagarin.

Yuri was born on March 9, 1934 in Klushino, a small village 100 miles west of Moscow. His father was a cabinetmaker, carpenter, bricklayer, and farmer, and his mother was a milkmaid. Together they worked on a kolkhoz or collective farm. By Soviet social standards, his heritage was impeccable. He was the third of four children. During the war, the Nazis threw his family out of their home and took away two of his sisters. Yuri helped his parents dig a dugout where they lived untill the war was over, then the family moved to Gziatsk. 

[…] 

Yuri was subjected to extremely rigorous training: physical, mental, and psychological. He underwent long periods in a sensory deprivation chamber, experiments with weightlessness, endurance in heat chambers, and test flights under stress with every reaction monitored. […] 

"During the days of preparation for the launch, when everyone had more than his share of concerns, apprehensions, and anxieties, he alone seemed to keep calm. More than that: he was full of good spirits and beamed like the sun." 

On April 12, 1961 the first earthling escaped the gravity well of planet earth. In the spaceship Vostok 1, Senior Lieutenant Yuri Alexeyevich Gagarin orbited earth one time at an altitude of 187 3/4 miles (302 kilometers) for 108 minutes at 18,000 miles an hour. He was the first man to see that the earth was indeed round, indeed mostly water, and indeed magnificent. 

Following his return to earth, Yuri's triumphant walk through Red Square in front of a crowd of hundreds of thousands made him more nervous and afraid than his historic flight. As he reached the podium, the awaiting Valya tearfully whispered in his ear, "Our dream has come true, Yuri." Embracing her he replied, "You're a smart girl! Thank you!" [...]

Russian Archives Online

Disponível em: <http://www.russianarchives.com/gallery/gagarin/>. Acesso em: 19 mar. 2014. (Fragmento)

Rewrite some clauses from the text in just one sentence and set the chronological order for the events according to the text. The beginning of each sentence was given.

A) Yuri helped his parents dig a dugout where they lived / the war was over.

Before the war was over, __________________________________________________________

______________________________________________________________________________

B) Yuri was subjected to extremely rigorous training / He underwent long periods in a sensory deprivation chamber. 

After Yuri had been subjected to extremely rigorous training ______________________________

______________________________________________________________________________

C) Senior Lieutenant Yuri Alexeyevich Gagarin orbited earth one time at an altitude of 187 3/4 miles (302 kilometers) for 108 minutes at 18,000 miles an hour / the first earthling escaped the gravity well of planet earth 

When Senior Lieutenant Yuri Alexeyevich Gagarin orbited earth ___________________________

______________________________________________________________________________

______________________________________________________________________________

D) He reached the podium / the awaiting Valya tearfully whispered in his ear: "Our dream has come true, Yuri." 

After he had reached the podium, ___________________________________________________

______________________________________________________________________________

______________________________________________________________________________

(ENEM 2018 1ª APLICAÇÃO) “A Declaração Universal dos Direitos Humanos está completando 70 anos em tempos de desafios crescentes, quando o ódio, a discriminação e a violência permanecem vivos”, disse a diretora-geral da Organização das Nações Unidas para a Educação, a Ciência e a Cultura (Unesco), Audrey Azoulay.

“Ao final da Segunda Guerra Mundial, a humanidade inteira resolveu promover a dignidade humana em todos os lugares e para sempre. Nesse espírito, as Nações Unidas adotaram a Declaração Universal dos Direitos Humanos como um padrão comum de conquistas para todos os povos e todas as nações”, disse Audrey.

“Centenas de milhões de mulheres e homens são destituídos e privados de condições básicas de subsistência e de oportunidades. Movimentos populacionais forçados geram violações aos direitos em uma escala sem precedentes. A Agenda 2030 para o Desenvolvimento Sustentável promete não deixar ninguém para trás – e os direitos humanos devem ser o alicerce para todo o progresso.”

Segundo ela, esse processo precisa começar o quanto antes nas carteiras das escolas. Diante disso, a Unesco lidera a educação em direitos humanos para assegurar que todas as meninas e meninos saibam seus direitos e os direitos dos outros.

Disponível em: https:/Inacoesunidas.org. Acesso em: 3 abro 2018 (adaptado).

Defendendo a ideia de que “os direitos humanos devem ser o alicerce para todo o progresso”, a diretora-geral da Unesco aponta, como estratégia para atingir esse fim:

(UFSJ) Depois de comprovada a atuação dos clorofluorcarbonos (CFCs) na destruição da camada de ozônio, esses compostos foram inicialmente substituídos por outros, os hidrogenoclorofluorcarbonos (HCFCs). Entretanto, percebeu-se que os HCFCs, embora não sejam tão danosos à camada de ozônio, são gases-estufa e, por isso, também estão sendo substituídos por gases menos prejudiciais ao ambiente.
Os gases-estufa são compostos que:

No século XVII, começaram a ser desenvolvidas atividades econômicas aumentando o contingente populacional nas áreas litorâneas.  

Escreva qual foi a principal atividade econômica desenvolvida nesse século.

Células caliciformes são células epiteliais altamente especializadas, presentes nas mucosas do corpo. Essas células são frequentemente identificadas em biópsias ou esfregaços citológicos usando um corante químico chamado de coloração periódica com ácido Schiff (PAS), que interage com mucopolissacarídeos.

GARCÍA-POSADAS, L. et al. Conjunctival Goblet Cell Function: Effect of Contact Lens Wear and Cytokines – Eye Contact Lens (Adaptação).

O corante utilizado nas técnicas mencionadas permite a visualização dessas células porque interage especificamente com