单项选择题According to the passage, human competition to develop the best weapons
单项选择题When the author reflects on the linked interdependence of attack and defense, he suggests that
单项选择题In this passage the author apparently intends to
单项选择题Gradually March seems to be in a state of
单项选择题At the end of the story, there seems to be a sense of ______ between March and the fox.