Trong các nguyên tử N (Z = 7), O (Z = 8), F (Z = 9) và Ne (Z = 10), nguyên tử có nhiều electron độc thân nhất là

Hô hấp sáng xảy ra với sự tham gia của các bào quan theo thứ tự như thế nào?

Khi xoa hai bàn tay vào nhau cho nóng lên thì đã có quá trình truyền và chuyển hóa năng lượng nào xảy ra?

Nội dung nào dưới đây là nói đến vai trò của thuế?

Cho $A$, $B$ là hai biến cố xung khắc. Biết $P\left(A \right)=\dfrac{1}{3}$, $P\left(B \right)=\dfrac{1}{4}$. Khi đó $P\left(A\cup B \right)$ bằng

Tính chất của cuộc chiến tranh thế giới thứ hai thay đổi được đánh dấu bằng sự kiện nào?

Bản chất của quá trình mã hóa thông tin là

Choose the correct answer.

Women usually _____ household finances better than men do.

It can be said that these good life skills will make young people become more confidential.

Bản chất của công nghệ đúc là:

Cơ quan nào sau đây có thẩm quyền thông qua dự việc toán ngân sách và giám sát ngân sách của nhà nước?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

Biting into a ripe, juicy fruit brings a smile to many people’s faces. But eating that same fruit a week before it is ripe probably wouldn’t be as enjoyable! Unripe fruits are often hard and bitter, but that serves a purpose. The hard exterior of an unripe fruit protects the developing seed inside. After a seed fully develops inside the fruit, the fruit changes color, softens, and gets sweeter to become more attractive to animals and humans. These organisms eat the fruit and spread its seeds, ensuring the plant’s survival and regrowth.

But how does a fruit ripen? The ripening process involves many complex chemical reactions. When a fruit ripens, it goes through a chemical change. A chemical change happens when bonds within molecules break, and the atoms that once formed them regroup into new molecules. Chemical changes are irreversible. Once a fruit ripens, it cannot become unripe again.

One molecule responsible for this chemical change is ethylene. Ethylene (C2H4) is a colorless gas made up of carbon and hydrogen atoms. (I). It is a naturally occurring molecule in the atmosphere. (II). It is also an important plant hormone. (III). Plants release ethylene through the growing tips of roots, flowers, and ripening fruit. (IV). Although ethylene serves other purposes in plants, one of its main purposes is to trigger the chemical reactions that cause fruits to ripen. As the fruit matures, oxygen in the air helps stimulate the production of ethylene. This ethylene production is a signal that begins fruit ripening. For that reason, unripe fruits have low levels of ethylene, while ripe fruits have higher levels of ethylene. Most fruits produce ethylene and respond to ethylene in the atmosphere.

Although fruits require ethylene to ripen, different types of fruits respond to this molecule in two distinct ways: non-climacteric fruits and climacteric fruits. Non-climacteric fruits do not ripen after harvesting. They produce very little ethylene of their own. Climacteric fruits, on the other hand, continue to ripen after they are picked. These fruits produce a large amount of ethylene. Climacteric fruits can also speed up the ripening process of other fruits nearby since they release high levels of ethylene into the air.  

The phrase These organisms in paragraph 1 refers to...

Choose a suitable word or phrase (marked A, B, C, or D) to fill in each blank.

The firm spent thousands dollars wining and dining ____________ clients.

Những loài động vật sinh trưởng và phát triển qua biến thái hoàn toàn?

Read the following passage about powering and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40. 

TikTok is a popular social media app where people can create and share short videos [I]. It started in China in 2016 as Douyin [II]. The app is known for its easy-to-use tools that let users add music, effects, and filters to their videos [III]. People of all ages enjoy making and watching TikTok videos, which can be funny, educational, or creative [IV].

One of the reasons TikTok is so popular is because of its algorithm, which shows users videos that match their interests. When you open the app, you see a personalized feed called the "For You" page. This page is different for everyone and updates with new videos all the time. Users can also follow their favorite creators to see more of their content.

TikTok has become a platform for trends and challenges. Many users participate in dance challenges, lip-syncing, and other viral activities. These trends can spread quickly, reaching millions of people in a short time. Because of this, TikTok has influenced music charts, fashion, and even language. Songs that go viral on TikTok often become hits on other platforms too.

The app is also a space for education and advocacy. Many creators use TikTok to share knowledge about various topics, such as science, history, cooking, and fitness. Others use the platform to raise awareness about social issues and promote positive change.

In addition to individual creators, many brands and businesses use TikTok for marketing. They create content to engage with their audience, often using popular trends and challenges to promote their products.

However, TikTok has faced some criticism and challenges. Concerns about privacy and data security have led to scrutiny from governments. Despite these issues, TikTok still remains one of the most downloaded apps in the world.

According to paragraph 2, which of the following is NOT true about TikTok's algorithm?

Câu nào sử dụng phép so sánh chuỗi?

Nguyên tắc tối ưu của thiết kế kĩ thuật là gì?