Nếu hiệu điện thế giữa hai bản tụ tăng 4 lần thì điện dung của tụ

Trong mặt phẳng toạ độ \(Oxy\), cho hai điểm \(A(1;5),B(3;2)\). Điểm \(C\) đối xứng với \(A\) qua \(B\). Toạ độ điểm \(C\) là?

Ưu điểm nào không phải là ưu điểm của mạng không dây?

Read the following passage about wildlife conservation 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.

[I] Wildlife conservation refers to the efforts made to protect and preserve wild animal species and their habitats. [II] It is crucial for maintaining biodiversity, which plays a vital role in ecosystem stability and health (Smith & Jones, 2018). [III] Unfortunately, many species are threatened due to habitat destruction, poaching, and climate change, making conservation efforts more urgent than ever. [IV]

One of the primary reasons for wildlife conservation is the preservation of biodiversity. A diverse range of species contributes to ecosystem services, such as pollination, water purification, and climate regulation. The loss of a single species can disrupt these services and lead to ecological imbalances. For instance, the decline of pollinators like bees has serious implications for food production and agriculture (Global Biodiversity Outlook, 2020).

Moreover, wildlife conservation has significant economic benefits. Many communities depend on ecotourism, which relies on healthy wildlife populations and intact ecosystems. According to a study by the World Wildlife Fund (WWF), ecotourism can generate billions of dollars in revenue, providing jobs and supporting local economies (WWF, 2021). Protecting wildlife not only safeguards natural resources but also creates sustainable livelihoods for local populations.

However, effective wildlife conservation requires a collaborative approach. Governments, non-governmental organizations, and local communities must work together to implement policies and strategies that promote conservation efforts. Community-based conservation initiatives, where local people actively participate in protecting their natural resources, have shown promising results. These initiatives empower communities and ensure that conservation efforts are tailored to local needs and contexts (Bennett & Dearden, 2014).

Where in paragraph I does the following sentence best fit?

Conservation measures are essential for the survival of many endangered species.

Phương trình tham số của đường thẳng đi qua điểm \(M(2;1)\) và có vectơ chỉ phương \(\vec u( - 1;4)\) là?

Nguyên nhân chính phía Đông của Liên Bang Nga không thuận lợi cho phát triển nông nghiệp?

Dân số thế giới tăng hay giảm là do đâu?

Read the following passage about managing change 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. 

Growing up in Athens, Greece, Lydia Borsi remembers feeling tested when she tried to deal with mental health issues. Borsi says she had been seeing a therapist for anxiety. But she notes that people in Greece do not openly discuss mental health issues, which also get little attention in general healthcare services. “It was a lot more secretive. And people thought that I was a lot more unique,” Borsi said.

That all changed in 2017 when she moved to the United States to study at the University of Rochester in Rochester, New York. “When I came here, I really liked that people were not afraid to speak up about mental health and say that it’s important,” she said. The university was very supportive of her needs and offered plenty of information. She also became involved with a school group called Active Minds that helps students deal with mental health issues. [A]

Then due to the spread of the novel coronavirus, the University of Rochester had to move all its classes and some of its mental health resources online. Luckily, Borsi was able to connect with a mental health expert outside the school, in the local community. [B]

But as many of her American friends returned home, Borsi was stuck. Greece had succeeded in limiting the spread of the virus within its borders, but flights there from the U.S. are barred until July. Also, the health crisis has put her plans to seek admission to medical school in Britain on hold. [C] And she is not alone.

[D] In April, Active Minds launched a survey of over 2,000 students at U.S. colleges and universities. The study found that over 80 percent of those asked said the coronavirus crisis had negatively affected their mental health. One in five said it has affected them severely.

Laura Horne, chief program officer at Active Minds, says the findings are especially troubling given that the crisis is only going to make it harder for colleges and universities to help these students. “Colleges and universities had to pivot rather quickly to respond to COVID-19 and figure out all facets of university life, including mental health services. Now they have to figure out how to communicate with students,” Horne said.

Frank Chen is a Houston, Texas-based psychiatrist who has worked with college-age young adults. He points out that individuals at that age are in an important stage of their mental development. And college can be a difficult experience for students with or without mental health issues, as they balance work, studies, and personal relationships. Adding a major world event, like the spread of the coronavirus, makes it very difficult to predict what the long-term psychological effects might be. “I don’t think that there’s another event in the history of the people who are alive now that can really measure up to this,” said Chen.

According to the passage, how has coronavirus crisis affected 20 percent of college students?

Thần Prô - mê - tê đã làm điều gì cho con người?

Đặc điển của vaccine DNA là

Trong không gian \(O x y z\), cho mặt cầu \((S)\) có phương trình: \([x-(m-1)]^{2}+(y-1)^{2}+(z+1)^{2}=4\)

Gọi \(I\) là tâm mặt cầu \((S)\) thì độ dài đoạn \(O I\) đạt giá trị nhỏ nhất bằng

Xét vị trí tương đối của hai đường thẳng

\({{d}_{1}}:3x-2y-6=0\) và \({{d}_{2}}:6x-2y-8=0\).

Nội dung nào KHÔNG PHẢI đặc điểm cơ bản của văn học Việt Nam giai đoạn 1945 – 1975?

Choose A, B, C or D: He is exhausted. He ______ around the whole afternoon trying to clean the house before the guests arrive.

Một vật chịu tác động của hai lực bao gồm $\overrightarrow{F_1}$ theo phương $\overrightarrow{MA}$ tạo với phương nằm ngang một góc 60° và $\overrightarrow{F_2}$ theo phương $\overrightarrow{MB}$ nằm ngang. Vật di chuyển được một đoạn 4 m theo phương ngang từ M. Hai lực $\overrightarrow{F_1}$ và $\overrightarrow{F_2}$ có cùng độ lớn bằng 10 N. Công sinh bởi hợp lực của $\overrightarrow{F_1}$ và $\overrightarrow{F_2}$ có độ lớn bằng bao nhiêu?

Biểu đồ dưới đây thể hiện nội dung nào về ngành công nghiệp khai thác than, dầu, khí tự nhiên của nước ta giai đoạn 2019 - 2022?

Chủ nghĩa tư bản hiện đại là thuật ngữ được dùng để chỉ chủ nghĩa tư bản từ sau thời điểm nào sau đây?

Điền số nguyên đương thích hợp vào ô trống.

Số các cặp số nguyên dương \(\left( x;y \right)\) thỏa mãn

\(1\le x\le 2023\) và \(\text{ln}\left( \frac{{{4}^{y}}+1}{x} \right)=\text{ln}\left( x+1 \right)-y\text{ln}4\)

là (……).

Read the following advertisement 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 1 to 6.

Living Every Moment Fully: Secrets to Happiness in the Digital Era

Are you seeking balance in your life? The (1)_________ balance between online and offline worlds awaits you!

Our modern (2)_________ create unnecessary daily life stress in our increasingly connected world. Stolen moments (3)_________ your phone during important conversations add up to lost time. We should remind people (4)_________ the value of being present together.

The secret (5)_________ in finding your perfect digital-life harmony through mindful technology use. Start prioritizing real connections today (6)_________ your life into something meaningful.

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