Rotato của máy phát điện xoay chiều một pha là một khung dây phẳng quay xung quanh một trục nằm trong mặt phẳng của khung trong từ trường của stato, suất điện động cảm ứng đổi chiều một lần trong mấy vòng quay? 

Cộng hòa Nam Phi tiếp giáp với đại dương nào sau đây?

Vua Gia Long tỏ thái độ như thế nào đối với các nước phương Tây?

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.

Fire Ant Festival 2024 - November 25

The upcoming Fire Ant Festival will be an incredibly exciting event, where you will be introduced (1)______ lively games and thrilling activities. In a vibrantly decorated outdoor space, visitors will have the chance to take part in traditional games such as tug-of-war, endurance competitions, and on-land boat racing. The highlight of the festival is the (2)______, where teams will compete to create (3)______ fire ant-inspired structures. Additionally, guests can enjoy breathtaking fire dance performances (4)______ by professional artists from various regions. Although named after a creature known to(5)______ a threat to many other species, the festival has proven to be safe for visitors. The festival is also an opportunity for visitors to try unique traditional folk games, which have been preserved and developed over many generations. Come join us to soak up the lively atmosphere, we promise(6)____ you unforgettable memories! 

Mỗi orbital nguyên tử chứa tối đa

Read the passage below and choose A, B, C or D.

Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.

Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection. Noise causes effects that the hearer cannot control and to which the body never becomes  accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.

Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America's number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.

What does the word “it” in paragraph 1 refer to?

Những điều kiện lí, hóa của môi trường trong cơ thể dao động quanh một giá trị cân bằng nhất định gọi là

B. cân bằng nội môi.

Kiến thức về địa lí tự nhiên định hướng ngành nghề gì?

Nhận định nào sau đây không phản ánh đúng hậu của của lạm phát đối với đời sống xã hội?

Cho đoạn tư liệu sau đây:

“Thực hiện nhất quán đường lối đối ngoại độc lập, tự chủ, hòa bình, hữu nghị, hợp tác và phát triển. Tổ chức thật tốt các hoạt động đối ngoại, nhất là đối ngoại cấp cao; chủ động, tích cực, làm sâu sắc, thực chất hơn nữa quan hệ với các đối tác; đẩy mạnh đối ngoại đa phương; giữ vững đường lối đối ngoại độc lập, tự chủ, hòa bình, hợp tác và phát triển; đa phương hóa, đa dạng hóa các quan hệ quốc tế; chủ động, tích cực hội nhập quốc tế sâu rộng, lấy lợi ích quốc gia, dân tộc là trên hết, trước hết.”

(Tạp chí Cộng sản, số 1.014, tháng 5-2023, tr. 79).

Cho hai biến cố $A, B$ sao cho $P(A)=0,4$; ${P}(B)=0,8$; ${P}(B | A)=0,3$. Giá trị của ${P}(A | B)$ là

Xác định điều nào đúng với các thể Barr ở người?

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.

Where in paragraph 1 does the following sentence best fit?
The shift towards renewable energy is seen as a necessary response to the global energy crisis.

Giải thích nào sau đây là đúng khi nói về hành vi cài đặt thêm các mã nguồn vào phần mềm bẻ khóa?

Nghề nào sau đây thuộc nhóm sản xuất, lắp ráp sản phẩm cơ khí động lực?