Để thực hiện quản lí chi tiêu cá nhân và tiết kiệm hiệu quả, em cần làm gì?

Cho tập hợp $X = \{1;5\}$, $Y = \{1;3;5\}$. Tập $X \cap Y$ là 

Thị trường có mấy chức năng cơ bản?

Phiên mã ngược là quá trình tổng hợp DNA dựa trên khuôn mẫu RNA. Quá trình này được xúc tác bởi một loại enzyme đặc biệt gọi là enzyme phiên mã ngược (RT: reverse transcriptase). Enzyme này có cả hoạt tính DNA polymerase và hoạt tính RNase H. Cũng giống như DNA polymerase trong quá trình tái bản DNA, enzyme phiên mã ngược đòi hỏi phải có primer (mồi) đặc biệt để tổng hợp nên DNA mới.

Enzyme phiên mã ngược được phát hiện lần đầu tiên ở retrovirus. Sau khi các retrovirus đi vào tế bào vật chủ, genome của RNA của nó sẽ được phiên mã ngược thành DNA sợi đôi, rồi tích hợp vào DNA của vật chủ.

Điểm giống nhau giữa phiên mã và phiên mã ngược là?

Giá trị nhỏ nhất của \(F(x;y) = x - 3y\), với điều kiện \(\left\{ \begin{array}{l}x \ge 0\\0 \le y \le 5\\x + y - 2 \ge 0\\3x - y \le 6\end{array} \right.\)?

Ý nào sau đây là nói về khái niệm thuế?

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.

I was an MBA student in the USA and I lived in the university’s coed dormitory. In my culture, usually, if a woman talks to a man, it is a sign of romantic interest. (34)_____, in the first few days of school, I found it strange that so many women were talking to me and I was under the impression that some women on my dormitory floor were interested in me. To (35)__________ their politeness, I would buy   them flowers or offer small gifts, as is done in my country. However, I was quite surprised to see that these same women now  seemed (36)______around me. One was even quite offended and told me to leave her alone. Eventually I talked to the residence adviser on my floor to see what I was doing wrong, and he explained to me the way men and women usually interact in the USA. I was quite relieved to hear that (37)____ was wrong with me, but rather with the way I was interpreting my conversations with    women. Even though I did not find the love of my life while I was in the USA, I still made many good female friends afterwards (38)______I still maintain contact.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 18 to 23.

       Music brings many benefits to our lives, especially when we learn something new. Firstly, it makes learning more enjoyable. When we listen to music while studying, it can help us feel relaxed and happy. (18) _______. For example, if you are learning a new language, listening to songs in that language can help you understand and remember words better.

       Secondly, music helps us focus. (19) _______, our mind becomes less distracted. We can concentrate better on our tasks, whether it’s reading, writing, or solving problems. This is because music has a special way of grabbing our attention and (20) _______.

       Finally, music connects us with other cultures. Through music, we can learn about the traditions, feelings, and (21) _______. It’s like traveling to new places without leaving (22) _______. We can hear different instruments, rhythms, and voices that tell us about the rich diversity of our world.

       In summary, music is not just about entertainment. It helps us learn better, stay focused, and (23) _______. It’s a powerful tool that can make our learning journey more exciting and rewarding.

Việc làm nào sau đây không phải là thực hiện nghĩa vụ bảo vệ Tổ quốc của công dân?

Công dân có quyền gì với tài chính - ngân sách nhà nước?

Read the passage carefully. Choose an option (A, B, C or D) that best answers each question from 23 to 30.

1. How do children learn about wildlife? And is what they learn the sort of thing they should be learning? It is my belief that children should not just be acquiring knowledge of animals but also developing attitudes and feelings towards them based on exposure to the real lives of animals in their natural habitats. But is this happening?

2. Some research in this area indicates that it is not. Learning about animals in school is often completely disconnected from the real lives of real animals, with the result that children often end up with little or no understanding or lasting knowledge of them. They learn factual information about animals, aimed at enabling them to identify them and have various abstract ideas about them, but that is the extent of their learning. Children's storybooks tend to personify animals as characters rather than teach about them.

3. For direct contact with wild and international animals, the only opportunity most children have is visiting a zoo. The educational benefit of this for children is often given as the main reason for doing it but research has shown that zoo visits seldom add to children's knowledge of animals – the animals are simply like exhibits in a museum that the children look at without engaging with them as living creatures. Children who belong to wildlife or environmental organizations or who watch wildlife TV programmes, however, show significantly higher knowledge than any other group of children studied in research. The studies show that if children learn about animals in their natural habitats, particularly through wildlife-based activities, they know more about them than they do as a result of visiting zoos or learning about them in the classroom.

4. Research has also been done into the attitudes of children towards animals. It shows that in general terms, children form strong attachments to individual animals, usually their pets, but do not have strong feelings for animals in general. This attitude is the norm regardless of the amount or kind of learning about animals they have at school. However, those children who watch television wildlife programs show an interest in and affection for wildlife in its natural environment, and their regard for animals in general is higher.

According to the third paragraph, which method is most effective for children to learn about animals?

Cơ cấu kinh tế là tập hợp các yếu tố nào?

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions:

He was injured after jumping _________ the wall yesterday.

Cho \(\int\limits_{\frac{\pi }{6}}^{\frac{\pi }{4}}{{{(2\tan x+\cot x)}^{2}}}dx=a+b\sqrt{3}+c\pi (*)\).

Biết rằng, tồn tại duy nhất bộ ba số hữu tỉ a, b, c thỏa mãn (*). Tổng \(a+b+c\) có giá trị bằng bao nhiêu (nhập đáp án vào ô trống, kết quả làm tròn đến chữ số thập phân thứ hai)?

Biểu hiện nào dưới đây thể hiện tính chất nhiệt đới ẩm gió mùa của sông ngòi nước ta?

Trong GIMP, lệnh nào được sử dụng để tạo dãy khung hình cho ảnh động dựa trên hiệu ứng có sẵn?

Choose A, B, C or D that has the CLOSEST meaning to the given sentence in the question.

Volunteering can be more rewarding than working for a paycheck.

Tìm các nghiệm \(\left( x;y \right)\) của bất phương trình \(\frac{x}{2}+\frac{y}{3}-1\le 0\). Trong đó \(x,y\) là các số nguyên dương. Tính \(x+y\).

Có 5 tế bào sinh tinh của một loài động vật giảm phân. Số tế bào con được tạo ra sau quá trình giảm phân là bao nhiêu?

Read the following passage about the Designing Spaces That Connect Us to Nature 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.

Biophilic design has been turning heads and winning hearts by incorporating natural elements into our living and working spaces. This approach recognizes our innate connection to nature and how it affects our well-being. Studies show that exposure to natural light, plants, and natural materials can reduce stress and improve productivity. Many modern architects now integrate gardens, water features, and large windows into their designs. These elements help create environments where people can thrive both mentally and physically. As one designer put it, "We're bringing the outside in to help people feel at home in their skin."

The benefits of biophilic design extend beyond aesthetics. [I] Hospitals with views of nature report faster patient recovery times. Office buildings with natural elements see decreased absenteeism and increased worker satisfaction. [II] Schools incorporating biophilic principles observe improved student concentration and academic performance. [III] Even retail spaces benefit, with customers spending more time and money in naturally-designed environments. These practical advantages explain why biophilic design is gaining momentum across various sectors. [IV]

Implementing biophilic design doesn't require elaborate renovations. Simple changes like adding houseplants, using natural materials, or rearranging furniture to maximize natural light can make significant differences. Even artificial representations of nature, such as nature photography or recordings of birdsong, provide some benefits. The key is creating spaces that stimulate our senses in ways that remind us of natural environments. This approach works in urban apartments, suburban homes, and rural settings alike. As cities grow denser, these natural connections become increasingly valuable for maintaining our psychological health.

Looking ahead, biophilic design will likely become standard practice rather than a luxury option. Climate change concerns are pushing architects to create buildings that not only connect with nature but also protect it. Living walls that purify air, rooftop gardens that reduce energy consumption, and materials that sequester carbon are becoming more common. These innovations represent a shift from merely appreciating nature to actively participating in its preservation. By designing spaces that honor our biological need for natural connection, we create environments that support both human and planetary health for generations to come.

The word “it” in paragraph 4 refers to _________.

Giới hạn sinh thái là giới hạn chịu đựng của sinh vật đối với một nhân tố sinh thái nhất định của môi trường, trong đó sinh vật có thể tồn tại và phát triển ổn định theo thời gian, nằm ngoài giới hạn sinh thái thì sinh vật không tồn tại được.

Trong giới hạn sinh thái có điểm giới hạn trên (max), điểm giới hạn dưới (min), khoảng cực thuận (khoảng thuận lợi) và các khoảng chống chịu. Vượt ra ngoài các điểm giới hạn, sinh vật sẽ chết.

Hình 1. Sơ đồ giới hạn sinh thái về nhiệt của 3 loài sinh vật.

Những loài có giới hạn sinh thái rộng với nhiều nhân tố thì có vùng phân bố rộng, những loài có giới hạn sinh thái hẹp đối với nhiều nhân tố thì có vùng phân bố hẹp. Ở cơ thể còn non hoặc cơ thể trưởng thành nhưng trạng thái sinh lí thay đổi, giới hạn sinh thái đối với nhiều nhân tố bị thu hẹp.

Loài nào trong 3 loài sinh vật trên có vùng phân bố rộng nhất?