What is the main idea of the passage ?
Giải bởi Vietjack
C
Nội dung chính của bài đọc là gì?
A. Có một phân tử mới được gọi là natri nitrat.
B. Các nhà máy đang làm ô nhiễm môi trường.
C. Các mô hình khí hậu phải được cập nhật bởi vì phân tử mới natri nitrat.
D. Natri nitrat có đặc điểm hóa học khác so với các phân tử bụi khác.
Dẫn chứng:
“ Calcite- containing dust particles blow into the air and combine with nitric acid in polluted air from factories to form an entirely new particle – calcium nitrate , ”
These nitrates have optical and chemical properties that are completely different from those of the originally dry dust particles . Due to this, climate models need to be updated to reflect this chemistry.
=>Chọn C
What can be inferred about the White House from the information in the second paragraph?
Research studies have shown that pressures put on students nowadays are ______.
According to the author, the fact that more full-time students are working for pay ______.
According to the passage, now that scientists know that unusual neurons in certain people are the cause of migraines, they
Why does the passage begin with a description of the properties of calcium nitrate?
According to the passage, what was the greatest advantage of oil as fuel?
