Người lái xe ô tô hãm phanh để xe giảm tốc độ từ 23 m/s đến 11 m/s trong 20 s. Độ lớn của gia tốc.

Cho cấp số nhân \(\left(u_{n}\right)\) có \(u_{2}=-6, u_{5}=48\). Tính \(S_{5}\).

Câu tục ngữ nào sau đây có nội dung nói về đặc điểm của cơ chế của thị trường?

Chọn phương án đúng: Vật liệu Graphene:

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.

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Cho biết: Phương pháp đầu tiên để điều khiển tốc độ động cơ một pha là?

Công dân trình báo cho cơ quan có thẩm quyền về hành vi vi phạm pháp luật gây thiệt hại đến lợi ích hợp pháp của công dân, cơ quan, tổ chức là thực hiện quyền gì?

Nguyên tố nào là nguyên tố vi lượng?

Nhận định nào sau đây thể hiện chức năng hành pháp của Chính phủ nước Cộng hoà xã hội chủ nghĩa Việt Nam?

Ý nào sau đây không phải là đặc điểm của văn hóa tiêu dùng Việt Nam?

Phát biểu nào không đúng với dao động của thuỷ triều?

Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.

The explosion in mobile phone use around the world has made some health professionals worrieSome doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.

On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't agree.

What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

What is the word “potentially” in paragraph 4 closest in meaning to?

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.

The True Cost of Convenience: Facts That Will Change Your Habits

When one plastic bottle is thrown away, (7)_________ will soon replace it in our landfills. Fast fashion companies (8)_________ millions of unsold clothing items each year.

The (9)_________ caused by single-use items affects our oceans and wildlife. (10)_________ their convenience, plastic straws harm marine animals.

The waste from our daily (11)_________ can take hundreds of years to decompose. A (12)_________ of people don't realize the impact of their daily choices on the environment.

Make small changes today for a better tomorrow! Choose reusable bags, bottles, and containers. Together, we can make a difference!

Câu nào dưới đây dùng từ sai về nghĩa?

Một chất điểm dao động điều hòa. Khi vật chuyển động từ vị trí biên về vị trí cân bằng thì

Quốc gia nào sau đây có nhiều múi giờ đi qua lãnh thổ nhất?

Vì sao Tin học là một ngành khoa học?

Cộng đồng ASEAN được xây dựng với ba trụ cột, trong đó KHÔNG bao gồm

Để sao chép ảnh từ vùng mẫu sang vùng đích cần thực hiện?

Tập xác định của hàm số \(y=\frac{1}{x}+\sqrt{3-x}\) là

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

In English class yesterday, we had a discussion around different cultures.