- 问题详情:AyoungAmericandoctorwassleepingwhensuddenlyhisdoorbellbegantoring.Itwasalreadymidnight,butwhatcouldthedoctordo?Hehadtogetup,putonhiscoatandgodownstairs.Whenheopenedthedoor,hesawamanstandingwithahatinhishand.“Howdoyoudo?”saidtheman,“Canyouc...
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