Điện áp giữa hai đầu của một điện trở R là \(u = {U_0}\cos \omega t,\) cường độ dòng điện chạy qua nó là

Các nước Mỹ Latinh hiện nay còn phụ thuộc nhiều nhất vào quốc gia nào sau đây?

Cho hình lập phương \(ABCD.{A^\prime }{B^\prime }{C^\prime }{D^\prime }.\) Số đo góc nhị diện \(\left[ {{C^\prime },{\rm{AB}},{\rm{C}}} \right]\) bằng

Sự hút khoáng thụ động của tế bào phụ thuộc vào yếu tố nào?

Hành động nào dưới đây không phù hợp với các quy tắc an toàn trong phòng thực hành?

Ủ phân compost là

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:

Gió Đông cực thổi từ áp cao nào?

Đâu là vi sinh vật có kiểu dinh dưỡng hóa dị dưỡng?

Chọn ngẫu nhiên lần lượt các số \(a, b\) phân biệt thuộc tập hợp \(\left\{3^{k} \mid k \in \mathbb {N}, 1 \leq k \leq 10\right\}\). Tính xác suất để \(\log _{a} b\) là một số nguyên dương.

Có mấy vai trò của chăn nuôi đối với đời sống kinh tế - xã hội?

Khái niệm về khoa học:

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

Nhận định nào sau đây không đúng với thuận lợi chủ yếu để phát triển kinh tế của Hoa Kì?

Các bước nào dưới đây là đúng khi nói về tiến trình của phương pháp làm việc trong phòng thí nghiệm?

Nội dung nào sau đây là nhiệm vụ của Sử học?

Một vật đang nằm yên trên mặt đất, lực hấp dẫn do Trái đất tác dụng vào vật có độ lớn

Chuyển động nào sau đây là chuyển động biến đổi?

Choose the best answer to fill in the blank (14)