Phát biểu nào sau đây sai khi nói về quá trình lên men?

Bệnh do điều kiện ngoại cảnh bất lợi:

Chọn đáp án đúng. Cho a, b là các số thực dương. Giá trị của \(\ln \frac{a}{b} + \ln \frac{b}{a}\) bằng?

Cách hình dung và miêu tả đất, trời trong câu “đất phẳng như cái mâm vuông, trời trùm lên như cái bát úp, ...” trong truyện Thần Trụ trời gợi cho bạn nhớ đến truyền thuyết nào của người Việt Nam?

Cho đoạn chương trình sau:

if d>0:

x1=-b-math.sqrt(d)/2*a

x1=-b+math.sqrt(d)/2*a

Lỗi sai trong đoạn chương trình trên là:

Read the following passage about the impact of tweeting on everybody 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 18 to 22

EVERYBODY’S TWEETING

Twitter (18) ________________ for a podcasting website, but then people realized that it offered them the power to connect with millions of people instantly. Suddenly, everyone had a voice, as long as it wasn’t longer than 140 characters. But what are we using it for, and just how is Twitter changing the way we do things?

Perhaps the greatest impact Twitter has had is on breaking news. Before Twitter, (19) _____________ before finally broadcasting it on the radio or TV. These days, anyone who happens to be in the right place at the right time with a Twitter account can post news the second it happens. For example, Janis Krums posted a photo and a tweet when he witnessed a US flight making an emergency landing in the Hudson River. He must never have imagined that he would break the story to the world.

Following Pop Idols

Young people have always loved to follow their pop idols, and Twitter has made it a whole lot easier. Before the Internet, teenagers used to join the fan clubs of their favorite bands and write letters to their heroes,

(20) _________________ to get a reply written by the club secretary. Today’s teenagers don’t need to wait. By following their idols on Twitter, they get all the news the minute it happens: their meals, activities, or even thoughts. And all the news comes directly from the bands themselves.

Creating Movements

Twitter allows people who think the same way to get together and (21) ______________. These problems may be cyberbullying, sexism, or racism. They can share information, organize campaigns, and put pressure on related departments. Twitter has given the man and woman on the street the power to make a difference.

Identifying the source of a piece of news

It’s good to get an idea of the background of a person who says or writes something. Are they an impartial expert or someone who wants to change your opinion to suit their own agenda? For example, this statement about a flu epidemic, “Patients can already spread the virus a day before they’ve even fallen sick themselves”, is more likely to come from a doctor than a politician. On the other hand, “We have to stop people who are carrying the virus from getting into the country” is more likely to come from a politician. (22) _____________, you’re better able to decide how much importance to give it and whether you can really trust what they say.

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).

According to paragraph 2, which of the following is NOT a reason for wildlife conservation?

Phương án nào sau đây là giá trị chuyển đổi sang hệ thập phân của 11010?

Cho hai tập hợp $A=\left\{ 1;2;3;7 \right\}\text{,}\ B=\left\{ 2;4;6;7;8 \right\}$. Mệnh đề nào sau đây đúng?

Nội dung nào sau đây là đặc điểm của văn bản quy phạm pháp luật?

Read the following passage about world festivals and mark the best answer to the questions from 11 to 18. 

     World festivals have a big impact on young people today. Festivals such as Christmas, Diwali, Halloween, and Chinese New Year are celebrated across the globe, bringing people together. Young people especially enjoy these events because they offer a chance to have fun, learn about different cultures, and develop a global mindset.

     Festivals help young people appreciate diversity. Attending a festival from another culture teaches them new traditions, food, music, and art. For example, attending the Rio Carnival or the Holi Festival of Colors can give young people an exciting experience of new cultures. They learn to respect and understand people from different backgrounds, which is important in today’s world.

     Another impact is that festivals allow young people to express themselves creatively. Many festivals include costumes, dances, and music that encourage self-expression. For instance, during Halloween or a music festival like Coachella, young people often wear creative outfits or costumes that reflect their personalities. This makes them feel confident and allows them to experiment with new styles.

    Festivals also offer opportunities for young people to connect with others. Meeting people at festivals, whether in person or online, helps them build friendships and networks. Social media plays a big role in this, as many young people post about their experiences, spreading awareness of the festivals they attend.

     Overall, world festivals provide many learning and social experiences for young people, helping them grow into more open-minded and creative individuals. 

In which paragraph does the writer discuss the social connections young people can make through festivals?

Cho phương trình nhiệt hoá học sau:

2H₂(g) + O₂(g) → 2H₂O(l)         \({{\Delta }_{r}}H_{298}^{0} = - 571,6kJ.\)

Nhiệt tạo thành của H₂O(l) ở điều kiện chuẩn là

Con hãy lựa chọn đáp án Đúng hoặc Sai

Đỗ Phủ cùng quê với nhà thơ Lý Bạch, Hạ Chi Trương, đúng hay sai?

Một vật dao động tắt dần có các đại lượng giảm liên tục theo thời gian là

Read the following passage 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 30 to 34.

    A new study highlights the health benefits of natural spaces in urban areas. Researchers found that people (30) _______ with plenty of green space, such as parks, have lower stress levels. (31) ____________ showed higher stress levels than men in the same situation.

    The research proved that why (32) _______. There is good evidence from the UK and elsewhere suggests that green spaces lead to lower blood pressure, better mental health, and (33)____________or dying from heart disease.

    Studies also indicate that spending time in natural environments improves mental and physical health, reducing the burden on healthcare systems. Consequently, (34)__________and green areas as part of  their efforts to enhance public well-being.

Loại gió nào sau đây hoạt động quanh năm ở nước ta?

Cho các số thực \(\mathrm{a}, \mathrm{b}, \mathrm{c}\) thỏa mãn \(c^{2}+a=18\) và \(\lim _{x \rightarrow+\infty}\left(\sqrt{a x^{2}+b x}-c x\right)=-2\). Tính giá trị biểu thức \(P=a+b+5 c\).

Điểm giống nhau giữa khởi nghĩa Hai Bà Trưng và khởi nghĩa Lý Bí là gì?

Một hạt bụi nhỏ có khối lượng m = 0,1 mg, nằm lơ lửng trong điện trường giữa hai bản kim loại phẳng. Các đường sức điện có phương thẳng đứng và chiều hướng từ dưới lên trên. Hiệu điện thế giữa hai bản là 120 V. Khoảng cách giữa hai bản là 1 cm. Xác định điện tích của hạt bụi. Lấy g = 10 m/s².

Nước ta có thuận lợi giao thương với quốc tế nhờ