4．B。考查标题判断。作者将自己从飞行员职业经历中所获取的经验运用到行医生涯中，使自己善于倾听别人的建议，从而使自己成为了一名优秀的医生。B项符合题意。

　　B

　　[2017·北京高考]

　　Tail Spin

　　Two dolphins race around in a big pool in the Ocean Park. The smaller dolphin, Grace, shows off a few of her tricks, turning around and waving hello to the crowd. The most amazing thing about her, however，is that she's even swimming at all. She doesn't have a tail.

　　Grace lost her tail as a baby when she got caught up in a fish trap. When the dolphin arrived at the Ocean Park in December 2005, she was fighting for her life. “Is she going to make it？” Her trainer, Abbey Stone, feared the worst. Grace

　　did

　　make

　　it－but

　　her tail

　　didn't. She ended up losing her flukes and the lower part of her peduncle.

　　Over the past six years, she has learned to swim without her tail. Dolphins swim by moving their flukes and peduncle up and down. Grace taught herself to move another way－like a fish! She pushes herself forward through the water by moving her peduncle from side to side.

　　The movements put harmful pressure on Grace's backbone. So a company offered to create a man­made tail for her. The tail had to be strong enough to stay on Grace as she swam but soft enough that it wouldn't hurt her.

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