The speaker’s main topic is _________.
Giải bởi Vietjack
Đáp án B
Chủ đề chính của diễn giả là?
A. hệ thống điều hoà B. floruacacbon và tầng ozone
C. tia cực tím D. ứng dụng của bình phun
Câu 2 đoạn 1: “First, we’ll touch on the relationship between fluorocarbons and the ozone layer”
(Đầu tiên ta sẽ bàn đến mối tương quan giữa floruacacbon và tầng ozone)
The word “constrained” in paragraph 4 is closest in meaning to______.
According to the passage, who was the first person to use artificial refrigeration for a practical purpose?
What can be inferred from paragraph 1 about cold storage before the invention of artificial refrigeration?
The word "rough"in the passage is closest in meaning to ___________.
According to the passage, the first refrigerated railcar used what material as a cooling agent?
According to the passage, all of the following are true EXCEPT___________.
What is the main point the writer is trying to make in the last paragraph?
How did Juliette Davidson benefit from the experience of her first job?
Beta blockers work on some physical and emotional symptoms because they ________.
