According to the passage, scientists used isotopes from the water of the ice core to determine which of following?
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Theo đoạn văn, các nhà khoa họ sử dụng chất đồng vị từ nước trong lõi đá để xác định cái gì:
Lượng không khí đã nổi bọt lên tới bề mặt kể từ khi đá hình thành
Nhiệt độ khí quyển khi đá được hình thành
Ngày mà nước bị giữ trong sông băng
Tốc độ nước bị đóng băng trong sông băng
Đáp án: B. Giải thích: Thông tin nằm ở:
“Instruments were used to measure the ratio of certain isotopes in the frozen water to get an idea of the prevailing atmospheric temperature at the time when that particular bit of water became locked in the glacier.” (Các công cụ đã được sử dụng để đo tỷ lệ của các đồng vị nhất định trong nước đóng băng để xác định nhiệt độ khí quyển phổ biến tại thời điểm khi một lượng nước đặc biệt đó bị khóa trong sông băng.)
The expansion of the natural history museum is most _______ the cause of significant revenue increases.
Stop acting like a child. In a few weeks, you'll be coming of _______ and nobody will tolerate your foolish behavior any longer.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29
Prime Minister Nguyen Xuan Phuc has delivered Vietnam’s strong message, aspiration, and determination to become a “country of renovation and creativity” and an economy with globally extensive (25) _______ when engaging in every activity of the World Economic Forum (WEF) 2019 in Davos, Switzerland.
He participated in 37 activities where he and heads of State and Government leaders of 50 countries and executives from (26) _______ groups around the globe discussed and dialogued matters relating to the forum’s theme “Globalization 4.0: Shaping a Global Architecture in the Age of the Fourth Industrial Revolution”.
Prime Minister Phuc said the Fourth Industrial Revolution is “knocking” on every enterprise and bringing profound changes that no country can be an outsider, and (27) ______ Vietnam’s wish to become one of the passengers at the (28) ________ of the Industry 4.0 train, and enthusiastically work with other countries to build a wealthy world.
In Davos, PM Phuc and WEF President Borge Brende had a dialogue themed “Vietnam and the World”, which is the first-ever event on Vietnam held by the WEF. Through the dialogue, PM Phuc conveyed strong messages about Vietnam’s development and international integration, asserting that (29) _______ the current circumstance, Vietnam has maintained an economic growth and socio-political stability that demonstrates itself a reliable destination for foreign investors coming to do business.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
I was upset to learn that my first opponent would be Sam Muller, who _______ part in tournaments for no less than ten years.
Despite the roadblock, the police allowed us to enter the restriction area to search for our friends.
On Sundays, many people take their cars to service stations _______
Professor Wallace has been given a prestigious award in _____ of his pioneering research in treating the AIDS patients.
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
It does not seem very probable that Eric will be able to find a new apartment before he has to leave his old one.
Of course, we don’t need this dictionary at present, but in the long ____ it may prove useful.
Had they arrived at the sale early, they ______ a better selection.
I will leave a message for you with my secretary. It is possible that I will be out when you telephone.
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of the primary stress in each of the following questions.
