Tìm số trung bình cộng của:

19 ; 34 và 46

Read the following passage and mark the letter A, B, C or D on your sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 36 to 46

I was with Overseas Volunteers (OV) for a year after leaving university, and I was sent to an isolated village in Chad, about 500 kilometres from the capital N’Djamena. Coming from a (36)______country, I got quite a shock, as conditions were much harder than I had ( 37) ______. But after a few days I soon got used to (38) ______there. The people were very friendly and helpful, and I soon began to appreciate how beautiful the countryside was.

One of my job was to supply the village with water. The well was a long walk (39) _____, and the women used to spend a long time every day ( 40)_______heavy pots backwards and forwards. So I contacted the organization and arranged to (41 ) _____some pipes delivered. We built a simple pipeline and a pump, and it worked first time. It wasn’t perfect there were a few (42) _____but it made a great difference to the villagers, (43 )______had never had running water before. And not (44 ) ____did we have running water, but in the evenings it was hot, because the pipe had been (45) ____ in the sun all day.

All in all, I think my time with OV was a good experience. I would recommend it to anyone who was planning to work for a charity

Điền vào ô 41

A make 

B. let

C. have

D. allow

Khi tổng hợp 180g glucôzơ thì cây C₃

A. đã quang phân li 108g nước

B. giải phóng 384g O₂

C. sử dụng 134,4 lít CO₂ (đktc)

D. sử dụng 18 mol NADPH

Phân tích thành phần không khí hít vào và thở ra ở người, người ta thu được kết quả;

Kết luận nào sau đây đúng nhất?

A. O₂ được cơ thể lấy vào dùng cho hô hấp tế bào

B. Lượng O₂ lấy vào cân bằng với lượng CO₂ thải ra

C. Cơ thể có nhu cầu lấy O₂ cao hơn thải CO₂

D. Nitơ không có vai trò gì đối với sự hô hấp

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

Their holiday plans fell through because there was a shooting at their school on Valentine’s Day

A. They couldn’t go on holiday as planned as a result of a shooting at their school on Valentine’s Day

B. They failed to go on the holiday like they had planned because a shooting took place at their school on Valentine’s Day

C. A shooting at their school on Valentine’s Day almost put a stop to their holiday plans

D. Disappointingly, a shooting at their school on Valentine’s Day forced their holiday plans to nothing