单项选择题

In the last sentence of paragraph 3, "it" refers to ______.

A．political functions
B．the essence of political process
C．power
D．different interests
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单项选择题
Why does Jerry Mander see TV as a disturbing influence
A．It is because people's eyes scan a TV screen 10 times a second.
B．It is because people's mind and behavior tend to be changed by TV.
C．It is because the conscious mind registers all images it perceives.
D．It is because it is ineffective in getting across its messages.
单项选择题
Jerry Mander suggests that long periods of exposure to artificial light ______.
A．may cause brain damage
B．could lead to death
C．could endanger people's health
D．would alter the brain cells
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