单项选择题

It can be inferred from the passage that the author would disapprove of______.

A．investment in computers
B．the use of ones internal computer
C．double-checks on computers
D．complete dependence on computers for decision-making
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单项选择题
Giraffes do not have swollen legs because______.
A．their legs and feet have strong skin and muscles
B．their blood vessels are stiff and tough legs
C．they wear a kind of special suit
D．there are lots of one-way valves in the veins of their legs
单项选择题
According to the passage, the initial concern about computers was that they might______.
A．change our personal lives
B．take control of the world
C．create unforeseen problems
D．affect our businesses
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