1D 2C

Swimming has been my favourite sport since I was very small. I learnt to swim when I was just 5 years old. Swimming is a very popular sport; furthermore, it provides individuals with several physical and mental benefits.

There are some reasons why swimming is popular. Firstly, swimming is a sport for all age groups; besides, it is a lifetime activity. People can learn to swim as young as 4 or 5 years old or as old as 60 or 70. All it takes is the right instruction and desire to get in the pool. Secondly, swimming is cheap. You don't have to spend much money on it. All you need is just a swimsuit that makes you feel comfortable and a goggle that keeps water from your eyes. Even though you have to buy an admission ticket, it is not so expensive. Anyone can afford to go to swim. Finally, swimming is one of the most popular sports in the world.

Besides its popularity, swimming is a good activity that provides individuals with several physical benefits. First of all, swimming is a movement through water using one's legs and arms that provides an all body workout. As all of your muscles are used during swimming, it is an excellent form of exercise. Moreover, swimming can also be very beneficial to your heart and lungs. After a few laps, swimming can Giúp you cool-down, move blood through your muscles to Giúp them recover. Swimming builds up muscle strength , so your body is kept in perfect shape.

In addition to its physical benefits, swimming is also an effective way to relax. Swim with a very low effort, let your mind wander, focus on nothing but the rhythm of your stroke. This form of meditation can Giúp you gain a feeling of well-being. Furthermore, swimming is a wonderful recreational activity for you and your family. Swimming gives you a chance to be with your family or with some friends at the pool, or just to dip yourself in cool water. Spending hours at the pool on hot summer days is always my favourite pastime.

In conclusion, swimming is not only popular, but it is also one of the best all body workout a person can do. Besides its physical benefits, swimming is also a great recreational sport giving you peace of mind to continue with your day. Swimming has numerous advantages over other exercises and if done consistently will keep you in shape for the long period of time.

xét tam giác abc, ta có
AB=AC(tam giác ABC cân)
Tam giác ADE là tam giác cân vì
AB=AC(cmt)
hông bít đúng hông nhak pạn

Một con lắc lò xo gồm vật có khối lượng 100g được treo thẳng đứng tại nơi có gia tốc trọng trường g =   10 m / s 2 . Khi vật nhỏ ở vị trí cân bằng, lò xo dãn 1cm. Từ vị trí cân bằng kéo vật nhỏ thẳng đứng xuống dưới để lò xo dãn 2cm rồi truyền cho vật vận tốc 10 3   c m / s theo phương thẳng đứng để vật dao động điều hòa. Chọn chiều dương thẳng đứng lên trên, gốc toạ độ ở vị trí cân bằng của vật. Lấy π 2 = 10  Đồ thị nào sau đây diễn tả mối liên hệ giữa độ lớn lực đàn hồi và li độ của vật?

A. Hình3

B. Hình1

C. Hình 4

D. Hình 2