lỏng (ngu Max)

mây

gió, nhiệt độ, diện tích mặt thoáng. Còn tùy thuộc vào các chất.

3 tấn = 30 tạ

3 tấn xoay được là :560:8.30=2100(kg)

đáp số :2100 kg

ke cha may

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29. Fill in the appropriate word in question 25

  YOGA

          Yoga is one of the most ancient forms of exercise, originating in India 5000 years ago. Yoga has taken several years to become recognised world-wide, although recently, much more attention has been (25) ______ to it because of the ways in which it can benefit health. Yoga can be practised by anyone, at any age, in any physical condition, depending on physical needs. For example, athletes and dancers can practise it to (26) ______ their energy and to improve stamina; executives to give a much needed (27) ______ to their overworked minds; children to improve their memory and concentration. It's a good idea to (28) ______ with a doctor first if you've suffered from any type of injury. None of the exercises should (29) ______ you any pain, but it's best to start slowly at first. The best time to practise is either in the morning or in the evening. Beginners find it easier in the evening when the body is more supple

A. allowed

B. paid

C. put

D. provided

Đốt cháy hoàn toàn một ancol đa chức, mạch hở X, thu được H₂O và CO₂ với tỉ lệ số mol tương ứng là 3 : 2. Công thức phân tử của X là:

A. C₂H₆O₂

B. C₂H₆O

C. C₄H₁₀O₂.

D. C₃H₈O₂