单项选择题

According to the passage, human competition to develop the best weapons

A．began in the 20th century.
B．escalated in the 20th century.
C．is a modern phenomenon.
D．is genetically predetermined.
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单项选择题
When the author reflects on the linked interdependence of attack and defense, he suggests that
A．their origin preceded life.
B．their development is precipitated by one another.
C．their existence is dependent on human aggression.
D．their escalation cannot be halted.
单项选择题
In this passage the author apparently intends to
A．write a fictionalized account of evolution.
B．be scientifically precise.
C．raise philosophical issues.
D．convince readers that war is inevitable.
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