The level of acidity in the ocean is increased by ________.
D
Cuối bài nhắc tới CO2 là một tác nhân gây nên sự tăng độ acid của nước biển: “increasing carbon dioxide...increase the acidity of ocean waters.”
Why does the author mention “artistic, political, or pedagogic communication” in the passage?
The author mention all of the following as causes of declines in population growth after 1957
EXCEPT
According to paragragh 2, when their habitats grow warmer, animals tend to move ________.
According to the passage, dried foods are most useful for ________.
According to the passage, an exuberant tone of voice may be an indication of a
person’s ____________.
According to the passage, in computer-assisted animation the role of the computer is to draw the ________.