Giả sử lưới thức ăn trong 1 hệ sinh thái được mô tả ở hình bên. Nếu trâu rừng bị loại bỏ hoàn toàn khỏi hệ sinh thái này thì theo lí thuyết, có những dự đoán nào sau đây đúng? (Hãy viết liền các số tương ứng với các dự đoán đúng theo thứ tự từ nhỏ đến lớn).

 

1. Rận trâu sẽ bị loại bỏ khỏi hệ sinh thái này nếu chúng không lấy thức ăn từ mắt xích khác.

2. Số lượng cá thể sâu ăn lá có thể tăng lên vì có nguồn dinh dưỡng dồi dào hơn.

3. Số lượng cá thể nai không bị ảnh hưởng vì không liên quan đến cỏ 1.

4. Mức độ cạnh tranh giữa hổ và báo có thể tăng lên.

Tập nghiệm của bất phương trình $\Big(\dfrac{1}{3} \Big)^{\sqrt{x+2}}>3^{-x}$ là

Các hoạt động kinh tế có mối quan hệ như thế nào với nhau?

Ngày 17-12-2014 đã diễn ra sự kiện lịch sử nào trong quan hệ ngoại giao giữa Mĩ và Cuba?

Rút gọn biểu thức sau: \(A = \frac{{\sin x + \sin 3x + \sin 5x}}{{\cos x + \cos 3x + \cos 5x}}\)?

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 following passage about effective English language learning and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from from 18 to 22.

Learning a new language, especially English, can be both challenging and rewarding. To maximize your language learning potential, it's essential to adopt effective strategies. ___(18)___. By understanding your learning style and setting clear goals, you can create a personalized learning plan.

One of the most effective ways to improve your English is through consistent practice. ___(19)___. This could involve reading books, articles, or news, watching movies or TV shows, or listening to English songs or podcasts.

To enhance your speaking skills, it's crucial to engage in regular conversation practice. ___(20)___. Joining language exchange groups or finding a language partner can provide opportunities to practice speaking and receive feedback.

While practice is essential, it's equally important to learn correct grammar and vocabulary. ___(21)___. Using grammar books, online resources, or language apps can help you master the rules of English grammar.

In conclusion, effective English language learning requires a combination of consistent practice, strategic learning, and a positive mindset. ___(22)___. By embracing these strategies, you can achieve your English language goals and open up new opportunities.

Theo em, cho vay tín chấp là hình thức cho vay dựa vào điều gì?

Lĩnh vực nào thuộc an ninh phi truyền thống?

Phát biểu nào trong các phát biểu bên dưới là đúng?

Đâu là cách tạo hình nền trong phân cảnh?

Trong giới hạn nhất định, cường độ hô hấp

Lĩnh vực nghiên cứu cơ bản tập trung vào tìm hiểu những đặc điểm nào của thế giới sống?

Các quốc gia như EU, Nhật Bản, Hoa Kì có đặc điểm chung là gì?