单项选择题

Why is the author in favor of communication through print for children（）

A．It enables children to gain more social information.
B．It develops children's interest in reading and writing.
C．It helps children to memorize and practice more.
D．It can control what children are to learn.

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单项选择题

Which of the following is NOT mentioned about scientists in earlier times（）

A．They invented false theories to explain things they didn't understand.
B．They falsely claimed to know all about nature.
C．They did not believe in results from scientific observation.
D．They paid little attention to the problems they didn't understan

单项选择题

What is the author's attitude towards science（）

A．He is depressed because of the ignorance of scientists.
B．He is doubtful because of the enormous difficulties in scientific research.
C．He is confident though he is aware of the enormous difficulties in scientific research.
D．He is delighted because of the illuminating scientific findings.