单项选择题

The topic of the passage is ______.

A．the harmful influence of television in the home environment
B．the role of television in the socialization of children
C．the American children's television-viewing pattern
D．the role of mass media in developing children's basic skills

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单项选择题In the view of the author, the studies of the impact of television violence on children______.

A．have produced convincing results
B．have yet to be conducted
C．haven't touched upon long-term effects
D．haven't arrived at any meaningful conclusion

单项选择题The tone of the passage is ______.

A．pleading
B．hopeful
C．pessimistic
D．jocular

单项选择题The number about reported thefts and convictions is used to illustrate that______.

A．thefts have decreased considerably
B．crime does not pay
C．crime rate has risen
D．legal deterrents are not strong

单项选择题The author argues that ______.

A．crime decreases are not to be taken seriously
B．minor cases should also be registered
C．administrative changes should be made to curb crime
D．monetary level is an important criterion for judging crime

单项选择题A century ago, how many lived to, or past 100, within a population of 5 million

A．5,000,000.
B．10,000.
C．50,000.
D．1,000.