To which class of protozoans do the amoebae belong?
Đáp án C
(1) The Sarcodina, which include amoebae, float or row themselves about on their crusted bodies.
It can be inferred that the emergence of the mass media and specialised reading materials was an indication of ___.
The phrase “a specialised readership” in paragraph 4 mostly means “ ”.
Silent reading, especially in public places, flourished mainly because of ___.
When the Sun becomes a red giant, what will the atmosphere be like on the Earth?
Large amounts of gases may be released from the Sun at the end of its life as a .