Phương pháp học tập hóa học nhằm phát triển năng lực hóa học bao gồm bao nhiêu phương pháp?

Chăn nuôi hiện nay tồn tại mấy kiểu chuồng nuôi?

Trong môi trường nuôi cấy liên tục, sự sinh trưởng của quần thể vi sinh vật không bao gồm pha nào?

Biểu hiện nào chứng tỏ bộ mặt kinh tế - xã hội của các nước trong nhóm năm nước sáng lập ASEAN có sự biến đổi to lớn sau khi thực hiện chiến lược kinh tế hướng ngoại? 

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

[I] A newborn baby can see, hear and feel. By the age of five, a child can talk, ride a bike and invent imaginary friends. How does this development happen? [II]We don't understand the way language, thinking and planning develop very well. [III]Now scientists are using new technology to ‘see’ into children's brains. And they are discovering new information about the way a baby's brain develops. [IV]

A study in 2010 showed that children who were afforded more focus often gained an edge in IQ. The brain of a newborn infant contains nearly a hundred billion neurons. This number is comparable to that of an adult's brain. As they mature, an infant assimilates information through the sensory modalities of sight, hearing, smell, taste, and touch. This information fosters intricate connections between different regions of the brain. By the age of three, there are approximately a hundred trillion synaptic connections.

One experiment looked at images of babies' brains while they were listening to different sounds. The sounds were in different sequences. For example, one sequence was mu-ba-ba. This is the pattern ‘A-B-B’. Another sequence was mu-ba-ge. This is the pattern ‘A-B-C’. The images showed that the part of the brain responsible for speech was more active during ‘A-B-B’ patterns. This shows that babies can tell the difference between different patterns. This experiment is interesting because sequences of words are important to grammar and meaning. Compare two sentences with the same words in a different order: ‘John killed the bear’ is very different from ‘The bear killed John.’ So babies are starting to learn grammatical rules from the beginning of life.

Researchers also know that babies need to hear a lot of language in order to understand grammar rules. But there is a big difference between listening to television, audiobooks or the internet, and interacting with people. One study compared two groups of nine-month-old American babies. One group watched videos of Mandarin Chinese sounds. In the other group, people spoke the same sounds to the babies. The test results showed that the second group could recognize different sounds, however, the first group learned nothing. The scientist, Patricia Kuhl, said this result was very surprising. It suggests that social experience is essential to successful brain development in babies.

Where in paragraph 1 does the following sentence best fit?
"Scientists are now conducting experiments to understand how babies process language patterns."

Đạo hàm của hàm số \(y= 3x^5−2x^4 \) tại x=-1, bằng:

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

[I] Social media has become a dominant force in modern communication, offering a range of benefits and challenges. [II] It has revolutionized the way people interact, share information, and even form relationships. [III] While these platforms offer opportunities for connection and expression, they also have their drawbacks. [IV] For instance, excessive use of social media has been linked to a range of negative effects, including mental health issues, social isolation, and decreased productivity. [V] However, when used responsibly, social media can also offer a variety of positive outcomes, such as the ability to stay connected with loved ones, network professionally, and access valuable information and resources.

One of the major benefits of social media is its ability to keep people connected. For example, individuals who live far apart can maintain close relationships through regular communication on these platforms. Social media also facilitates professional networking, allowing users to connect with potential employers or clients, and enabling companies to promote their products and services to a global audience. Additionally, platforms like Facebook, Twitter, and Instagram provide a space for people to share ideas, opinions, and creative work, fostering a sense of community and collaboration.

Despite these advantages, there are serious concerns about the negative impact of social media, particularly on mental health. Studies have shown that excessive social media use can contribute to feelings of anxiety, depression, and loneliness. This is often attributed to the unrealistic portrayals of life that are commonly shared on these platforms, leading to comparisons that can make individuals feel inadequate or left out. Furthermore, constant exposure to negative news or online bullying can exacerbate these feelings and contribute to long-term psychological stress.

Another issue with social media is its potential to distract people from their daily responsibilities. With notifications constantly popping up and endless streams of content to scroll through, individuals may find it difficult to focus on tasks such as work, school, or personal obligations. This can result in decreased productivity and a lack of attention to important matters.

Ultimately, the impact of social media depends on how it is used. If individuals are mindful of their usage patterns and take steps to limit their time on these platforms, they can enjoy the benefits of staying connected and informed without the negative consequences. Parents, educators, and mental health professionals can also play a role in helping young people develop healthy habits and manage their social media use effectively.

Which of the following best summarizes paragraph 3?

Các cấp tổ chức của thế giới sống không bao gồm thành phần nào?

Chlorine có hai đồng vị bền trong tự nhiên, trong đó có một đồng vị là ³⁵Cl chiếm 77,5% số nguyên tử. Biết nguyên tử khối trung bình của chlorine là 35,45. Đồng vị còn lại là

Mỗi công dân cần làm gì để thực hiện đúng với nghĩa vụ tuân thủ Hiến pháp?

Một trong những nguyên nhân dẫn đến sự sụp đổ của Vương triều Tây Sơn là

Cho hình chóp $S.ABC$ có $SA \bot \left(ABC \right)$, $\Delta ABC$ là tam giác đều cạnh $a$ và $SA=a\sqrt{3}$. Khoảng cách từ điểm $A$ đến mặt phẳng $\left(SBC \right)$ bằng

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27.

People come to this small country for many reasons. They can admire spectacular (23)_________ meet friendly natives, and enjoy a vibrant arts scene. Some are searching for their family (24) _________ or others just want to get away from it all and, digging up old memories from their English Lit class of gallant heroes engaging in larger-than-life struggles, their minds wander to faraway lands, to somehow familiar yet different destinations. Why not go to Scotland? But what kind of country are they coming to and what should they expect once they get there? Scotland (25) _________ of an area of 30, 418 square miles - so it's a fairly compact and "doable" country - with a population of about five million people - not too small, not too big. It is one of three countries that form the political (26) _________ called Great Britain, the other two being, of course, England and Wales, which, along with their fourth partner, Northern Ireland, becomes the United Kingdom. Scotland is bordered on three sides by water and on its fourth by England, which has had both its advantages and disadvantages. Geographically speaking, the country can be divided into three broad areas, the Southern Uplands, the Central Lowlands, and the Highlands. Although the rugged Highlands (27) _________ about two-thirds of the land area, the vast majority of the population lives in the Central Belt between Glasgow, Scotlands largest city, and Edinburgh, Scotland's capital.

Cho giá trị thế điện cực chuẩn của một số cặp oxi hoá - khử:

\(E_{F{{e}^{2+}}/Fe}^{0}=-0,44~\text{V};E_{Z{{n}^{2+}}/Zn}^{0}=-0,76~\text{V};E_{C{{u}^{2+}}/Cu}^{0}=0,34~\text{V};E_{A{{g}^{+}}/Ag}^{0}=0,8~\text{V}\).

Hãy cho biết ion nào có thể oxi hoá được kim loại Fe.

Một học sinh làm thí nghiệm như sau:

Nạp đầy khí amoniac vào bình thủy tinh trong suốt, đậy bình bằng nút cao su có ống thủy tinh vuốt nhọn xuyên qua. Nhúng đầu ống thủy tinh vào một chậu thủy tinh chứa nước có pha thêm dung dịch phenolphtalein. Một lát sau, nước trong chậu phun vào bình thành những tia màu hồng.

Phát biểu nào sau đây không đúng?

Mục đích chính của cuộc vận động Duy tân đầu thế kỉ XX là

Một khối khí lý tưởng được chứa trong xilanh với pit-tông có thể chuyển động lên xuống theo phương thẳng đứng. Đường kính xilanh là 20 cm , áp suất khí là 102 kPa và ban đầu pit-tông cách đáy xilanh 30 cm như hình vẽ. Sau đó, khối khí được đốt nóng và đẩy pit-tông lên độ cao 35 cm so với đáy. Giả thiết áp suất của khối khí thay đổi không đáng kể, công của khối khí trong quá trình dịch chuyển pit-tông là:

Read the following passage and mark the letter A, B, C, or D to indicate the answer to each of the question

Vietnam’s population is ageing quickly. In 2017, more than 10 per cent of the population will be 60 and older, and in 15-20 years the elderly will account for one third of the total population. This raises concerns about healthcare, welfare and pensions for the elderly at a time when Vietnam is focusing on economic integration and requires a large labor force. So far two solutions have been proposed: to loosen the two-child policy and to increase the retirement age to 58 for women and 62 for men. By ending the two-child policy the government expects to make up for the ageing population within the next 20 years. But its effect could be creating an uncontrollable boom in the Vietnamese population. When the government loosened the two-child policy in 2015 in a trial period, in the first 6 months of 2016 the third child birth rate increased remarkably by 7.5 per cent

Raising the retirement age has been proposed by the Ministry of Labor pending parliamentary evaluation in May 2017. While the policy is beneficial in utilizing the work experience of the elderly while creating savings in the pension budget, it also means fewer job prospects and promotion opportunities for younger generations. It is also not in the interest of all the elderly, especially the 70 per cent of Vietnam's labor force working in manual labor-intensive sectors such as agriculture, manufacturing and construction where working above the age of 50 can be dangerous and unproductive. Despite these drawbacks, raising the retirement age is still considered by policymakers as one of the key solutions to the ageing population problem in Vietnam. However, these are only temporary solutions.

Which statement is TRUE about raising the retirement age in the second paragraph?