Trong bốn hạt nhân \(_{52}^{130}{\rm{Te}},_{54}^{134}{\rm{Xe}},_{56}^{132}{\rm{Ba}},_{53}^{127}{\rm{I}},\) hạt nhân có bán kính gần nhất với bán kính của hạt nhân \(_{54}^{130}{\rm{Xe}}\) là

Cho hàm số \(y=f(x)\) liên tục trên \(\mathbb{R}\) và có đồ thị như hình vẽ.

Có tất cả bao nhiêu giá trị nguyên của tham số \(m\) để phương trình \(f(\sin x)=m\) có nghiệm thuộc khoảng \((0 ; \pi)\) ?

WAYS TO IMPROVE YOUR MEMORY

A good memory is often seen as something that comes naturally, and a bad memory as something that cannot be changed, but actually (622) ____________ to improve your memory.

We all remember the things we are interested in and forget the ones that bore us. This no doubt explains the reason why schoolboys remember football results (623) __________ but struggle with dates from their history lessons! Take an active interest in what you want to remember, and (624) ____________ . One way to make yourself more interested is to ask questions — the more the better!

Physical exercise is also important for your memory, because it increases (625) _______________ and sends more oxygen to your brain, and that makes your memory work better. Exercise also reduces stress, (626) _________________.

The old saying that ―eating fish makes you brainy may be true after all. Scientists have discovered that the fats found in fish like tuna, sardines and salmon — as well as in olive oil — help to improve the memory. Vitamin-rich fruits such as oranges, strawberries and red grapes are all good brain food, too.

(Source: ―New Cutting Edge, Cunningham, S. & Moor. 2010. Harlow: Longman)

Câu 622:

A good memory is often seen as something that comes naturally, and a bad memory as something that cannot be changed, but actually (622) ____________ to improve your memory.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34. Foot-racing is a popular activity in the United States. It is seen not only as a competitive sport but also as a way to exercise, to enjoy the camaraderie of like-minded people, and to donate money to a good cause. Though serious runners may spend months training to compete, other runners and walkers might not train at all. Those not competing to win might run in an effort to beat their own time or simply to enjoy the fun and exercise. People of all ages, from those of less than one year (who may be pushed in strollers) to those in their eighties, enter into this sport. The races are held on city streets, on college campuses, through parks, and in suburban areas, and they are commonly 5 to 10 kilometers in length. The largest footrace in the world is the 12-kilometer Bay to Breakers race that is held in San Francisco every spring. This race begins on the east side of the city near San Francisco Bay and ends on the west side at the Pacific Ocean. There may be 80,000 or more people running in this race through the streets and hills of San Francisco. In the front are the serious runners who compete to win and who might finish in as little as 34 minutes. Behind them are the thousands who take several hours to finish. In the back of the race are those who dress in costumes and come just for fun. One year there was a group of men who dressed like Elvis Presley, and another group consisted of firefighters who were tied together in a long line and who were carrying a fire-hose. There was even a bridal party, in which the bride was dressed in a long white gown and the groom wore a tuxedo. The bride and groom threw flowers to bystanders, and they were actually married at some point along the route.

A “bystander” as used in the last paragraph refers to which of the following?

Kết quả của giới hạn \(\underset{x\to -\infty }{\mathop{\lim }}\,\frac{2{{x}^{2}}+5x-3}{{{x}^{2}}+6x+3}\) là

Nơi nào diễn ra sự bào mòn, rửa trôi đất đai mạnh nhất?

Hoạt động kinh tế có vai trò trung gian, kết nối sản xuất với tiêu dùng được gọi là gì?

Nguyên tố vi lượng trong cơ thể sống không có đặc điểm nào sau đây?

Phát biểu nào dưới đây sai?

Read the following passage about the future of energy and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

     [I] As the world grapples with the finite nature of fossil fuel reserves and the detrimental impact of climate change, the future of energy undeniably lies in renewable sources. [II] Scientists and engineers are making substantial advancements in the development of technologies that more efficiently harness solar, wind, hydro, and geothermal energy. [III] Although the transition to these renewable sources presents significant challenges, it is also regarded as a pivotal step towards establishing a sustainable and resilient energy system. [IV]

     One of the most promising advancements in renewable energy is the enhancement of solar panel efficiency. Progress in photovoltaic technology has led to the creation of panels that convert a higher proportion of sunlight into electricity. Likewise, wind turbines are becoming more and more efficient. They are capable of generating power even under low-wind conditions. These innovations are essential for making renewable energy more feasible and accessible to a broader population.

     However, the transition to renewable energy is fraught with obstacles. The intermittent nature of sources like solar and wind necessitates reliable storage solutions to ensure a consistent power supply. Although battery technology has seen significant improvements, further advancements are imperative to meet growing demand. Moreover, new infrastructure for distributing renewable energy requires expansion and upgrading to accommodate these new power sources.

     The economic impact of transitioning to renewable energy is another critical consideration. While the initial investment in renewable energy infrastructure can be substantial, the long-term benefits include reduced energy costs and job creation in the green energy sector. Governments and private enterprises are increasingly acknowledging the necessity of investing in renewable energy projects, which is crucial for fostering innovation and diminishing reliance on fossil fuels.

     Ultimately, the future of energy hinges on our capacity to innovate and adapt. By continuing to invest in research and development, improving infrastructure, and addressing economic and technical challenges, we can transition towards a more sustainable and environmentally friendly energy system.

Which of the following can be inferred from the passage?

Nội dung nào không phải là hình thức thực hiện pháp luật?

Cho hàm số \(y = f(x)\). Hàm số \(y = f'(x)\) có đồ thị như hình dưới đây. Biết \(f(-1) = -2\)

Gọi S là tập hợp các giá trị \(m\) nguyên bé hơn 100 để bất phương trình \(f(x)-\frac{5}{3}x^3<m-x^5\) nghiệm đúng với mọi \(x \in (-1;1)\). Tính tổng các phần tử của S.

Each of the following sentences has one error (A, B, C, or D). Find it and blacken your choice on your answer sheet.

The young can find a job any time of year and the best places to do so are Vietnams’ three largest cities: Hanoi, Ho Chi Minh City and Da Nang.

Dựa trên phạm vi không gian, cà phê Việt Nam được bán ở những thị trường nào?

Một trong những hoạt động của Việt Nam Quang phục hội khi chiến tranh thế giới thứ nhất bùng nổ là

Đạo hàm của hàm số \(y = \left( {2{x^4} - 3{x^2} - 5x} \right)\left( {{x^2} - 7x} \right)\) bằng biểu thức nào dưới đây?