单项选择题

What is the main idea of the passage

A．All events are full of opportunities for learning.
B．We can enhance our future security by learning more about our society's complexities.
C．The September 11 terrorist attack is the most destructive disaster of all.
D．Terrorism poses a formidable threat to international security.
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单项选择题
Which of the following statements will the author most probably agree with
A．Financial considerations are more important than nonfinancial ones.
B．Nonfinancial considerations are more important than financial ones.
C．Nonfinancial considerations are as important as financial ones.
D．We have devoted more of our attention to nonfinancial considerations than is necessary.
单项选择题
The failure to implement safety procedures needed in aviation and high-rise office design results from______.
A．the great speed and efficiency of modern society
B．the complexity of various organizations
C．the management style
D．the predominance of concerns about profitability
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