Cho tam giác \(A B C\) có độ dài các cạnh là \(A B=5, B C=6, C A=7\).

Độ dài đường cao kẻ từ \(A\) của tam giác \(A B C\) là

Đơn vị lưu trữ dữ liệu lớn nhất là

Ở cùng một thời điểm, nếu ở phía tây đường chuyển ngày quốc tế là ngày 28/02/2022 thì ở phía đông sẽ là ngày bao nhiêu?

Khẳng định nào dưới đây là sai? Vecto động lượng

Mệnh đề phủ định của mệnh đề "$\forall x \in \mathbb{R}: \, x^2>x$" là

Hình ảnh dưới đây là hoạt động học sinh khối 11 tham quan thực tế tại nhà máy sản xuất phân bón.

Hoạt động trên tương ứng với phương pháp học tập hóa học nào?

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.

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Trọng tâm hoạt động của cuộc vận động Duy tân đầu thế kỉ XX trong lĩnh vực giáo dục là

Xác định ý đúng: Với sự phát triển và thay đổi của ngành thông tin liên lạc là nhờ sự tiến bộ của ngành nào?

Lớp $10{{B}_{1}}$ có $7$ học sinh giỏi Toán, $5$ học sinh giỏi Lý, $6$ học sinh giỏi Hóa, $3$ học sinh giỏi cả Toán và Lý, $4$ học sinh giỏi cả Toán và Hóa, $2$ học sinh giỏi cả Lý và Hóa, $1$ học sinh giỏi cả $3$ môn Toán, Lý, Hóa. Số học sinh giỏi ít nhất một môn (Toán, Lý, Hóa) của lớp $10{{B}_{1}}$ là

Hợp chất nào dưới đây tạo được liên kết hydrogen liên phân tử?

Cho cấu hình electron của Ca là (Ar)4s². Ca thuộc nguyên tố nào?

Những đường sức điện nào vẽ ở dưới đây là đường sức của điện trường đều

Read the following passage about food addiction and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

Few people would disagree that one of the world's most popular dishes is pizza. Twenty-two-year-old Zack certainly wouldn't. He would eat a variety of pizza-based items, including homemade pizza, precooked microwave pizza, and even pizza leftovers from the night before. He was consuming 800kg of pizza a year. As a child, Zack had eaten a wide variety of food. But he became addicted to pizza when he started secondary school. American school meals have often been criticised for the large amount of fast food present on the menu, and pizza is the star dish. Zack even spent all his pocket money on slices of pizza.

Naturally, Zack's family worried about his high-calorie, low-vitamin diet. So did Zack. In an attempt to break his addiction, Zack agreed to appear on a TV programme called Freaky Eaters. Its aim was to encourage food addicts to beat their addictions with the help of a psychologist and nutritionist. It wasn't easy. He had to eat a fish dish, while his brother sat in front of him enjoying... a pizza! However, Zack met the challenge and has never eaten pizza again.

Seventeen-year-old Stacy Irvine's friends visit her and discover that she has been rewarded thousands of free toys from fast food restaurants as a regular customer. Stacy's mother often gave her two-year-old girl a portion of fried chicken in a McDonald's restaurant. [I] Since then, Stacy has refused to eat anything else except for pieces of fried chicken, and as a result, her diet has created serious health. She has been warned that if she doesn't change her diet, she will die. [II] Stacy once collapsed due to lack of vitamins and nutrients and needed to be hospitalised. [III] She insisted that Stacy adopt a healthier lifestyle. However, worryingly, Stacy's mother said that while Stacy was beginning to understand the seriousness of her situation, she couldn't eat anything else but chicken nuggets. [IV]

Twenty-year-old Hanna Little was keen on chips. The only thing that Hanna consumed for fifteen years was one plate of chips after another. Not surprisingly, a diet that contained few nutrients and an excess of fat and carbohydrates could only have negative consequences. And it did because not only did Hanna develop health problems, but she also had to leave her job after collapsing at work. At five, Hanna became addicted to chips and refused to eat fruits and vegetables despite her mother's efforts. Hanna says that she was terrified of tasting the flavour of different types of food and she would feel anxious just at the idea of doing it. Parties, picnics and barbecues with friends and family used to be a nightmare. Furthermore, Hanna was soon seen as 'odd' by her friends' parents.

It wasn't until the age of sixteen that Hanna realised she had Selective Eating Disorder (SED). Despite this new knowledge, no solution was found. It wasn't until she lost her job before she started eating normally. Hanna sought therapy from psychologist Felix Economakis, who used hypnosis, a treatment that none of the doctors that she had seen before had mentioned, to get her to eat fruit after one one-hour session, and since then she has been willing to eat anything.... including chips!

(Adapted from Friends Global)

The word it in paragraph 4 refers to _____.

Thành phần nào sau đây của vi khuẩn gây bệnh giúp chúng tránh khỏi sự tấn công của các tế bào bạch cầu khi xâm nhập vào cơ thể con người?

Quá trình trao đổi chất và năng lượng diễn ra ở những loài sinh vật nào sau đây?

Giá cả của thị trường có các chức năng gì?

In paragraph 2, the word "it” refers to ____.