Số nghiệm nguyên của bất phương trình ${{3}^{{{x}^{2}}+2}}\le {{9}^{x+1}}$ là

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.

Which of the following statements would the author most likely support?

“Ao thu lạnh lẽo nước trong veo,

Một chiếc thuyền câu bé tẻo teo.

Sóng biếc theo làn hơi gợn tí,

Lá vàng trước gió khẽ đưa vèo.”

(Nguyễn Khuyến, Câu cá mùa thu)

Nghệ thuật tiêu biểu nhất trong đoạn trích trên là

Ngân sách nhà nước bao gồm những khoản nào?

Môi trường nào được sử dụng trong nuôi cấy vectơ phát hiện đầu dò?

Khi nói về quá trình trao đổi nước và khoáng ở thực vật, các phát biểu dưới đây đúng hay sai?

Let’s ___________ two different water sports: jet-skiing and kite surfing.

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 

a. Engaging in hobbies and personal interests can have a profound impact on overall well-being.

b. These activities provide a much-needed break from the routine of daily life.

c. Dear Sam, I've been reflecting on our discussion about balancing work and personal life.

d. Hobbies also allow for personal growth and skill development.

e. Gardening, painting, or playing a musical instrument can foster creativity and boost self-esteem.

UNIX là hệ điều hành có đặc điểm gì?

Trong phương trình dao động điều hoà: $x=A\cos\left(\omega t+\varphi\right)$, radian (rad) là thứ nguyên của đại lượng

Ở thực vật sống trên cạn, loại tế bào nào điều tiết quá trình thoát hơi nước ở lá?

Bộ phận xử lí của bàn là là gì?

Các doanh nghiệp sản xuất giấy ở Việt Nam luôn phải chú trọng cải tiến kĩ thuật và đổi mới công nghệ sản xuất nhằm đảm bảo cơ chế thị trường theo nguyên tắc của quy luật nào sau đây?

Rewrite the following sentences as long as the meaning is unchanged. Write full sentence.

He would rather read books than watch television.

He prefers _________________________________________________.

Tìm vi phân của hàm số y = xsinx+cosx

Tư hữu xuất hiện đã dẫn tới sự thay đổi trong xã hội như thế nào?

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.

Vertical Gardens & Virtual Communities: Your 2025 Urban Experience

Transform your daily life with our (1)_________ vertical gardens! Our (2)_________ creates beautiful urban spaces.

People (3)_________ in apartments love our space-saving solutions. We offer customers access (4)_________ virtual gardening classes.

Don't (5)_________ around the bush - start your garden today! c

Join thousands of happy urban gardeners today!

Easy setup in 30 minutes

Water-saving system

Connect with neighbors online

Weekly gardening tips

Call us: 0800-GREEN-CITY or visit www.verticalcity2025.com

Khu vực Mỹ La-tinh có diện tích khoảng bao nhiêu?