Đốt cháy hoàn toàn một hỗn hợp X (glucozơ, fructozơ, metanal và etanoic) cần 22,4 lít O 2  (điều kiện chuẩn). Dẫn sản phẩm cháy qua bình đựng dung dịch C a ( O H ) 2  dư, sau phản ứng hoàn toàn thu được m gam kết tủa. Giá trị của m là

A. 100

B. 120

C. 150

D. 205

Số 6303268125 có bao nhiêu ước số nguyên?

A. 420

B. 630

C. 240

D. 720

Mark the letter A, B, C, or D to indicate the correct response to each of the following exchanges. Two friends Nam and Lan are talking about the topic of healthy lifestyle and longevity.

Question. Nam: Do young people you know get enough exercise? - Lan: ____

A. Not really. They are a little bit lazy.

B. Getting enough exercise is very important.

C. They tend to eat too much junk food.

D. Fast food is the young people's favourite food.

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks

   A surprising number of popular spectator sports, for example football or baseball, (31)______ in Europe or the USA in the nineteenth century. This did not happen by chance. It was the (32) ______ of changes in the way people lived in those places at that time. Until then, more people lived In the country than in towns. They worked in small groups and had no regular time off. All this changed with the growth of factories and industry in the nineteenth century, first in Europe and (33) ______. In the USA. For the first time, most people began to live in towns, and they found themselves with regular free time. They had more leisure time than ever before. This resulted in the need for organized entertainment. Suitable games developed or were invented, typically team games, in which the crowd could (34) ______ sides and become involved. This gave people some of the entertainment they need in their free time. The recent explosion in TV, with the introduction of satellite and cable channels, has caused an increase in (35) ______ for sports as entertainment. The money TV has broughtto games such as football, tennis and baseball means that spectator sports will certainly go on playing an important part in our lives.

Question 32:

 A. result

B. cause

C. reason

D. effect