题目内容
It was her instructor who first introduced the idea of parachuting to the speaker.[音频]
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On the day of the speaker’s first jump, her instructor got into another aeroplane.
The speaker had an orange parachute on that day.
During her first jump, the speaker was first terrified, then excited, and she ended up looking forward to the next jump.
致密斑是()靠近毛细血管球处的血管壁上皮细胞特化形成的。
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