What is protoplasm?
(C) A primitive animal similar to a protozoan
Đáp án B
(1) The protozoans, minute, aquatic creatures each of which consists of a single cell of protoplasm
Silent reading, especially in public places, flourished mainly because of ___.
Paragraph 4 of the passage serves mainly to do which of the following?
According to the passage, many people’s understanding of desertification is incorrect because _____.
It can be inferred that the emergence of the mass media and specialised reading materials was an indication of ___.
Large amounts of gases may be released from the Sun at the end of its life as a .
Why did the author wait until the last line to reveal the identity of the man in the photograph?