Almost simultaneously, with a mighty volition of ungraduated, in

Almost simultaneously, with a mighty volition of ungraduated, instantaneous swiftness, the White Whale darted through the weltering sea. But when Ahab cried out to the steersman to take new turns with the line, and hold it so; and commanded the crew to turn round on their seats, and tow the boat up to the mark; the moment the treacherous line felt that double strain and tug, it snapped in the empty air!
Questions:
A. Identify the author and the title of the novel from which the quoted part is taken.
B. What's "Ahab"?
C. What does the phrase" the White Whale" symbolize?
【正确答案】：A. Herman Melville; Moby-Dick.
B. Ahab is a captain.
C. It symbolizes nature.