Đâu không phải là chức năng của giá cả thị trường?

Trường hợp nào sau đây, lực có tác dụng làm cho vật rắn quay quanh trục ?

Cho đoạn chương trình sau:

s=0

i=1

while i<=5:

s=s+1

i=i+1

Sau khi thực hiện đoạn chương trình trên giá trị của s là?

Aluminium là kim loại phổ biến nhất trên vỏ Trái Đất, được sử dụng trong các ngành xây dựng, ngành điện hoặc sản xuất đồ gia dụng. Hạt nhân của nguyên tử aluminium có điện tích bằng +13 và số khối bằng 27. Tính số proton, neutron và số electron có trong nguyên tử aluminium.

- Số proton: .

- Số neutron: .

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.

MAKE MEMORIES WITH CUSTOM PHOTO BOOKS

Are you tired of digital photos sitting on your phone or computer? Turn them into beautiful custom photo books with our easy-to-use platform. Our service ___(1)___ you to upload, organize, and design your own photo book, creating a unique keepsake to treasure forever. You can ___(2)___ between different layouts, themes, and covers to make your book truly special. With our high-quality printing, your memories will ___(3)___ vibrant and long-lasting. Plus, our photo books make great gifts for family and friends. Don't ___(4)___ your memories – capture them in a book you'll love to ___(5)___ for years to come. Start designing today and ___(6)___ 20% off your first order!

Cho biết: Đặc điểm nào giúp bạn phân biệt tế bào thực vật với tế bào động vật?

Cách mạng tư sản Pháp được đánh giá

Vì sao trong thí nghiệm sự tạo thành tinh bột trong quang hợp cần sử dụng iodine làm thuốc thử?

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each the numbered blanks from 631 to 635.

“One month on since the devastating earthquake hit Türkiye and Syria, the scale of the humanitarian response has yet to meet the enormous needs of displaced Syrian families and children (631)_____have suffered from compounded crises for almost 12 years now,” said Johan Mooij, director of World Vision’s Syria crisis response. “It is crucial that (632)_____ access channels to northwest Syria remain open, and that aid deliveries are scaled up through earmarked funding for the emergency response. Only this will ensure that children’s mental health needs are covered, and their trauma addressed.”

Snow and bitter winter weather have placed children at great risk of hypothermia (633)_____ they struggle to survive in sub-zero temperatures. Many survivors have had to sleep in cars, outside, or in makeshift shelters. Doctors (634)_____ that children are also at risk of exposure to waterborne diseases such as cholera or Hepatitis A due to the damage to shelters and water infrastructure.

These children are now even more vulnerable to family separation, exploitation, and abuse. As buildings are deemed unsafe, they also are unable to return to school.

“In northern Syria, in particular, the threats to children from abuse were already extreme. The soaring poverty, within a warzone, now devastated by earthquakes, has created an unimaginable number of challenges, and suffering for children,” says Johan, director of the Syria crisis response in Amman, Jordan. “This earthquake has created the perfect environment for a health crisis -fueled by reduced healthcare capacity and disease (635)_____.”

Câu 631:

Đường tròn \((C): x^2 + y^2 – 6x + 2y + 6 = 0\) có tâm I và bán kính R lần lượt là:

Một sợi dây dài 60cm có hai đầu A và B cố định. Trên dây đang có sóng dừng với 2 nút sóng không kể A và B. Sóng truyền trên dây có bước sóng là:

Nhận định nào sau đây không đúng với tình hình phát triển kinh tế của Cộng hòa Nam Phi?

Khi thiếu hoặc thừa nguyên tố khoáng, thực vật có biểu hiện là như thế nào?

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

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 worried. Some 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 mentioned about the man who used his cellphone too often in paragraph 3?

Cho hình chóp $S.ABCD$ có đáy là hình chữ nhật. Mặt bên $\left(SAB \right)$ là tam giác đều và nằm trong mặt phẳng vuông góc với đáy. Gọi $H$ là chân đường cao hạ từ đỉnh $S$ của tam giác $SAB$.

Khoảng cách từ đỉnh $S$ đến mặt đáy $\left(ABCD \right)$ là đoạn

Từ một hộp có \(4\) quả cầu đỏ và \(6\) quả cầu xanh. Ông X bốc ngẫu nhiên ra hai quả cầu thì thấy có quả cầu đỏ. Xét 2 biến cố: 

A: "Ông X bốc được quả cầu xanh",

B: "Ông X bốc được quả cầu đỏ".

Một con lắc đơn gồm vật nặng có khối lượng 200 g, dây treo có chiều dài 100 cm. Kéo vật khỏi vị trí cân bằng góc 60^o rồi buông không vận tốc đầu. Lấy g = 10 m/s². Cơ năng của con lắc là