在AD中，某些杂合体Aa中的显性基因A由于某种原因不表现出相应的显性性状，例如多指症，称为（）

单项选择题Authority gradient is an important factor that can have an effect on communication in a multi-crew environment. In a flight crew, an apt arranging is（ ） A. the captain's power, ability, longevity and status are higher much more than the other members of the flight crew. B. the captain's power, ability, longevity and status are equal to the other members of the flight crew. C. the captain's power, ability, longevity and status is higher than the other members of the flight crew in some short

多项选择题列出那些不在欧洲大陆，但是属于欧洲的国家？