Nguyên tố R có tổng số hạt mang điện và không mang điện là 34. Trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 10 hạt. Kí hiệu và vị trí của R trong bảng tuần hoàn là

Cho biết: Ở giai đoạn xâm nhập của Virut vào tế bào chủ xảy ra hiện tượng nào?

Quốc gia nào sau đây nằm hoàn toàn bên trong lãnh thổ Cộng hòa Nam Phi?

Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17.

Dear Lily,

a. I also read that you’ve been getting into photography. That’s fantastic! Have you thought about joining a local photography club? I bet it would be a great way to meet other enthusiasts and improve your skills.

b. I hope this letter finds you well! I’ve been thinking about our last conversation about trying new hobbies, and I wanted to share some exciting things I’ve discovered.

c. Recently, I started taking a pottery class, and it has been such a rewarding experience! It’s so satisfying to create something with my hands. 

d. By the way, I’m planning to attend a craft fair next month. Maybe we could go together. It would be fun to explore and see what others are creating.

e. Let me know what you think! I can’t wait to hear about your photography adventures.

Take care and talk soon!

Nội dung nào sau đây là một trong những lí do cần thiết phải học tập lịch sử suốt đời?

Cho hàm số \(f\left( x \right)\) xác định, có đạo hàm trên \(\mathbb{R}\) và \(f\left( 0 \right)=2\). Khi đó, đạo hàm của hàm số \(g\left( x \right)=f\left( x \right)\). \(\text{sin}x\) tại \(x=0\) bằng:

Muốn thể hiện vùng trồng thuốc lá của nước ta, có thể sử dụng phương pháp gì?

Một vật dao động xung quanh vị trí cân bằng theo phương trình \(x=1,5\text{cos}\left( \frac{t\pi }{4} \right)\); trong đó \(t\) là thời gian được tính bằng giây và quãng đường \(h=\left| x \right|\) được tính bằng mét là khoảng cách theo phương ngang của chất điểm đối với vị trí cân bằng.

Dialogue arrangement: Choose A, B, C or D to make a complete dialogue for each question. 

a. I see that you're pretty talented.

b. I wish I had a talent like that.

c. Oh, so you took an art class?

d. I'm sure you have a talent. It's just hidden.

e. Yeah, I loved that class.

f. Thank you very much.

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.

What does the author believe children should learn about wildlife?

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.

What can be inferred from paragraph 4 about children's attitudes to animals?

Find the mistake: When I walk past the park, I saw some children play football.

Theo quy định của pháp luật, công dân đủ từ bao nhiêu tuổi trở lên được phép đăng ký kinh doanh?

Giá cả của thị trường có các chức năng gì?

Trong mạch chỉnh lưu nửa chu kì, một diode được sử dụng để chuyển đổi dòng điện xoay chiều thành dòng điện một chiều. Nếu nguồn có tần số 50 Hz, dòng điện qua diode sẽ có tần số là:

Cuộc cách mạng nào dưới đây trở thành cốt lõi của cuộc cách mạng khoa học- công nghệ diễn ra từ những năm 70 của thế kỉ XX? 

Con hãy lựa chọn đáp án Đúng hoặc Sai

Truyện về các vị thần sáng tạo thế giới vừa là truyền thuyết vừa là thần thoại, đúng hay sai?

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence(s) that best complete(s) each of the following exchanges.

Greg: “Kate, Giga Mall is having a big sale this week. You wanna go?”

Kate: “_____________”

Cho dãy số \(\left(u_{n}\right)\) biết \(\left\{\begin{array}{l}u_{1}=1 \\ u_{n}=\frac{1}{3} u_{n-1}+2\end{array}\right.\). Mệnh đề nào sau đây đúng?

Tìm tập xác định \({\rm{D}}\) của hàm số \(y = \frac{{x + 1}}{{\left( {x + 1} \right)\left( {{x^2} + 3x + 4} \right)}}.\)