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.

单项选择题At the beginning of the story, the fox seems to be all EXCEPT