Nguyên tử khối trung bình của vanadium (V) là 50,94. Nguyên tố V có 2 đồng vị, trong đó đồng vị $^{50}_{23}V$ chiếm 0,25%. Số khối của đồng vị còn lại là

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.

Hi Sally,

a. We will eat snacks, cakes, drink fizzydrinks, and play some traditional games.

b. The party is going to be held at my house, and of course, all of our classmates are also invited. 

c. Also, this is a time for us to say goodbye to Cherry, who is flying to Japan the next Monday.

d. I’m throwing a farewell party at 7 p.m next Sunday. Are you free to join us?

e. Hope you can come and we’ll have a nice time together.

See you then,

Janna

Read the following notice about a new travel platform 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

MAKING HONEY

Do you like honey? Honey is a natural product, and it is made by honey bees. It has (1) __________ , which some people prefer to ordinary sugar. Sometimes it’s possible to know (2) __________  the flavour what kind of flowers the bees visited before producing the honey. Have you ever (3) __________  about how honey is produced? Beekeepers – people who look after bees are very important in the making of honey. They let the bees in their care (4) __________more honey than is needed. Then the honey can be removed without causing problems for the bees. Honey collection is an ancient activity, (5) __________ back at least 10.000 years. Thus, honey has become increasingly (6) __________  nowadays as a healthy food, so people of all age can use it not only to treat some simple ailments but also to slow down aging process.

Read the following passage about women in the workplace 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.

Marcel Bich, a French manufacturer of traditional ink pens, was the man (18) ______. Bich was surprised by the poor quality and high price of the ballpoint pens available at the time. However, he realised that the ballpoint pen was a well-established invention, (19) ______ that would succeed in the market.

"Bich approached the Biro brothers and asked for permission to use their original invention in one of his pens. In return, he offered to pay them for each pen he sold. (20) ______, he used a microscope to examine them closely."

By 1950, he was ready to introduce his new design: a plastic pen with a transparent barrel that wrote smoothly, didn’t leak, and cost only a few cents. The new ballpoint pen (21) ______. The public liked it immediately, and today it is as common as the pencil.

Bich's success allowed him to establish Société Bic, which expanded worldwide. (22) ______, producing not only pens but also lighters, razors, and even mobile phones.

Read the following passage about news 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).

Which of the following best summarizes the passage?

Mặt bằng là gì?

Loại hình vận tải nào có vai trò quan trọng nhất thúc đẩy sự phát triển của vùng Đông Xi-bia?

Quốc hội có mấy chức năng chính?

Read of the following leaflet 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 7 to 12.

Beyond Success: The Human Stories Behind Great Achievements

The Journey Behind Every Triumph

While some people focus only on achievements, (7)_________ understand that the path to success is filled with challenges and growth opportunities.

Great innovators often (8)_________ their mentors who guided them through difficult times. The resilience shown by successful people becomes their greatest strength in times of adversity. (9)_________ numerous failures, many accomplished individuals persevered until they reached their goals. Their determination and perseverance serve as (10)_________ for aspiring achievers worldwide. A (11)_________ of successful people attribute their achievements to the support of their families and friends.

Behind Every Success Story

Success is never just about the final achievement. It's about the human journey—the struggles, doubts, failures, and moments of (12)_________ that shape not just careers but character. Join us as we explore the personal stories behind some of the most remarkable achievements of our time.

Cơ quan quyền lực nhà nước cao nhất của nước Cộng hoà xã hội chủ nghĩa Việt Nam là gì?

Cho hai tập hợp $A = \{x \in \mathbb{R} \Big|(2 x - x^2 )( x -1) = 0\}$, $B = \{n \in \mathbb{N} \Big| 0 < n^2 < 10\}$. Chọn mệnh đề đúng trong các mệnh đề sau:

Ý nào sau đây không thuộc nội dung vai trò của sản xuất kinh doanh?

Cho tam giác ABC biết $\frac{\sin B}{\sin C}=\sqrt{3}$ và $AB=2\sqrt{2}$. Độ dài cạnh AC là

Ngân sách nhà nước có vai trò như thế nào đối với một quốc gia?

Triều Mạc thành lập vào năm

Quy trình số hóa âm thanh được hiểu là

Công nghệ bảo quản trong điều kiện khí quyển biến đổi?

Phân lớp d có thể chứa số electron tối đa là

Dòng nào sau đây trong tác phẩm Truyện Kiều không cùng cấu trúc với những dòng còn lại?