Khi x = 2 và y ≥ 0 thì bất phương trình sau có mấy cặp nghiệm nguyên: 2x + y < 6?

Một chiếc xe mô tô có khối lượng 220 kg đang chạy với tốc độ 14 m/s. Công cần thực hiện để tăng tốc xe lên tốc độ 19 m/s là bao nhiêu?

Chọn cặp từ/ cụm từ thích hợp nhất điền vào chỗ trống.

Khi đọc sách, bạn cần lướt qua những từ không _____ và tìm kiếm những từ khóa _____.

Các phát biểu dưới đây là đúng hay sai khi nói về ứng dụng của tin sinh học?

Hàm số $y=x^3-3x^2-9x+1$ đồng biến trên khoảng nào sau đây?

Tôn giáo được độc tôn ở thế kỷ XIX là:

Peptit Ala-Gly-Val-Ala-Glu có bao nhiêu liên kết peptit?

a. Engaging with these philosophical concepts has not only enriched my perspective but also fueled my desire to continue delving deeper into the complexities of human life.

b. This intellectual exploration introduced me to profound insights surrounding existence, ethics, and the nature of knowledge.

c. My interest in philosophy began as a way to challenge and expand my understanding of life’s fundamental questions.

d. However, as I immersed myself in the ideas and debates, I realized that philosophy significantly sharpened my ability to think critically and logically.

e. Initially, I was hesitant to explore philosophical ideas, unsure of how they would influence my thinking.

Ion O^2- không có cùng số electron với nguyên tử hoặc ion nào sau đây?

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 is the main topic of the first paragraph?

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 Ben,

a. I feel much stronger and more energized.

b. I’ve been following the workout routine you recommended, and it’s been amazing!

c. The exercises are challenging but effective.

d. Thanks again for helping me get started on this journey!

e. I appreciate your advice on staying consistent.

Best,

Michael

Phát biểu nào không đúng khi nói về cấu tạo tim của người và thú?

Which of the following best paraphrases the underlined sentence in paragraph 2?

Which of the following best paraphrases the underlined sentence in paragraph 3?