Một hệ dao động cơ đang thực hiện dao động cưỡng bức. Hiện tượng cộng hưởng xảy ra khi

Read the following passage about fitness trends 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.

FITNESS TRENDS

[I] Reformer Pilates is an advanced and more intense variation of traditional Pilates. [II] Since this type of equipment isn’t something you would typically have at home, you’ll need to visit a specialized Pilates center to try it. [III] While it might look easy at first, don’t be fooled - by the end of the session, your thighs will be burning, and you might struggle to walk up or down stairs for a few days afterward. [IV] This workout pushes your body to its limits, providing a more challenging experience than standard Pilates, and many find it an effective way to build both strength and flexibility.

Trampolining is another popular fitness trend, and although it may seem like child's play, it’s actually a highly effective workout. Jumping up and down on a trampoline can leave you feeling exhausted after just a few minutes. Surprisingly, it’s even better for heart health than running, while also improving coordination and helping to reduce stress levels. Trampolining is gaining widespread popularity, with new centers popping up that feature as many as 150 trampolines. These facilities offer options for everyone: you can enjoy 'freejumping,   where you bounce without an instructor, or pay for professional lessons to learn the best techniques and get the most out of your workout. Many people are discovering that trampolining combines fun and fitness in a way that makes staying active much more enjoyable.

If you're someone who is typically active but feeling down or emotionally drained, Dynamic Running Therapy might be just what the doctor ordered. This trend involves running with a therapist, combining the benefits of physical exercise with talk therapy. Though these sessions are often more expensive than typical therapy sessions because of the professional fees, they offer significant advantages. Running while talking helps distract you from any discomfort, allowing you to cover longer distances, and creates a relaxed, open environment that can make it easier to talk compared to the usual therapist’s office setting.

Which of the following best paraphrases the underlined sentence in paragraph 1?

Từ năm 1999 đến năm 2015, ASEAN có hoạt động nào sau đây?

Vì sao nước đi vào mạch gỗ theo con đường gian bào đến nội bì thì chuyển sang con đường tế bào chất?

Cho đoạn chương trình sau:

if d>0:

x1=-b-math.sqrt(d)/2*a

x1=-b+math.sqrt(d)/2*a

Lỗi sai trong đoạn chương trình trên là:

Nguyên nhân sâu xa của sự xuất hiện của dư thừa trong xã hội là:

Cho các đặc trưng sau:

(1) Dễ nhường electron.

(2) Dễ nhận electron.

(3) Oxide cao nhất có tính base.

(4) Oxide cao nhất có tính acid.

Những đặc trưng thuộc về phi kim là

Đơn vị lưu trữ dữ liệu lớn nhất là

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 thefollowing questions from 13 to 17.

Hi Harry,

a. I hope you’re doing well! I wanted to share some exciting news with you.

b. I’ve planted tomatoes, basil, and a few flowers to brighten the space.

c. Recently, I’ve started a small garden on my balcony, and it’s growing beautifully.

d. If you’re interested, I’d love to share some tips and learn about your gardening adventures too!

e. It’s been a fun project, and I can’t wait to see the first harvest.

Take care,

Jasmine

Trong không gian Oxyz, cho điểm \(I(3;0;1)\) và mặt phẳng \((P):x+2y-z+4=0\). Mặt cầu \((S)\) có tâm \(I\) và cắt \((P)\) theo giao tuyến là đường tròn có chu vi \(6\pi \). Phương trình mặt cầu \((S)\) là:

Trong trường hợp dưới đây, công ty A đã thực hiện hoạt động nào của nền kinh tế?

"Công ty A lên kế hoạch và tạo ra các sản phẩm văn phòng phẩm như bút, thước kẻ,... nhằm phục vụ cho việc sử dụng của người tiêu dùng đặc biệt là học sinh, sinh viên".

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.

Join Our Fitness Revolution

Are you ready to (7)________ your fitness game? 

At our gym, you’ll not only find state-of-the-art equipment but also a community that motivates and supports you. Some people come for weight training, while (8)______join for cardio classes. 

We offer various training (9)______, including yoga, Pilates, and strength building. (10)__________ personal training sessions, we have group classes to fit every schedule. 

Our trainers are (11)__________in the fields of fitness and health, dedicated to helping you achieve your goals. Gain a new (12)________of confidence, energy, and enthusiasm from your workouts! 

Don't wait to become the best version of yourself. Join us today!

Chủ thể nào trong tình huống dưới đây đã vi phạm quy định pháp luật về bình đẳng giới trong lao động?

"Chị H đang làm việc tại công ty xuất nhập khẩu X. Chị luôn hoàn thành tốt mọi công việc được giao, có chuyên môn tốt và được đồng nghiệp quý mến. Nhưng khi khuyết trưởng phòng nhân sự, ông T (giám đốc công ty) đã không bổ nhiệm chị làm trưởng phòng nhân sự mà lại bổ nhiệm anh Q với lí do chị là nữ, tuổi còn trẻ".

Trong công nghiệp, người ta sử dụng phản ứng giữa chlorine với dung dịch nào sau đây để tạo ra nước Javel có tính oxi hóa mạnh phục vụ cho mục đích sát khuẩn, vệ sinh gia dụng?

Lĩnh vực nào thuộc không thuộc an ninh truyền thống?

Lò cao là thiết bị được sử dụng để luyện gang - thép với nhiệt độ rất cao, khoảng 2000°C được biểu diễn như hình. Quá trình luyện gang diễn ra bằng cách nạp nguyên liệu gồm quặng sắt, than cốc và chất trợ dung vào lò. Khí nóng được đưa vào lò từ phía dưới để duy trì nhiệt độ và phản ứng hóa học. Sản phẩm cuối cùng là gang - thép được thu thập tại đáy lò.

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?