单项选择题

The first paragraph aims at telling the reader ______.

A．the importance of information resources management
B．the relationship between the medium and information
C．the great variety of media for holding information
D．the numerous resources of information
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单项选择题
What effect does joblessness and cuts in public assistance have on children of single-parent families
A．Another 3 million of them live in poverty.
B．The number of them increased by about 20 percent in just three years.
C．The number of them increased by about 3 percent in the 1980s.
D．They were not affected at all.
单项选择题
We can come to the conclusion that ______.
A．60 percent of American children are now born illegitimately
B．at least 50 percent of black children are now born illegitimately in America
C．60 percent of American children were born illegitimately in the 1960s
D．at least 60 percent of American children were born illegitimately in the 1960s
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