Why does the author compare books with radio technology in paragraph 5？
A. To describe the influence of handwritten books on radio
B. To explain how both changed patterns of information flow
C. To show that both were initially confined to a few users
D. To complain about the social restrictions imposed on radio
查看答案
The word those in paragraph 6 refers to
A. walls
B. roofs
C. huts
D. features
According to the passage, children between the ages of five and seven typically experience
A. development of rational thinking
B. an interest in morality and rules
C. important changes in the brain
D. an increase in the physical growth rate
A group's collective intelligence may be enhanced significantly when it is joined by someone of______.
A. high intelligence
B. high prestige
C. high operating ability
D. high coordination ability
The privacy bill of rights is meant to______.
A. clamp down web surfers' dishonest behaviours
B. restrict internet firms' control over information
C. give American government control over information
D. ease the tension between digital marketers and web users
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