题目内容

Adult identical twins also tend to have similar medical histories, developing the eye disease ____(青光眼) at the same time, for example.

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They measure these and other traits by the twins' responses to statements such as “I rarely, if ever, do anything reckless” and “The flames of a wood fire stimulate my____(想象力)”.

And according to Bouchard, the data on the identical twins raised apart show clearly that nature-the genes we ____(经遗传而得到)-exerts a notably strong influence over our lives.

The scientists bring each pair of twins to the University of Minnesota for a week of ____(加强的,集中的) testing.

Every summer since 1976, this little town outside Cleveland, Ohio, has been ____(大批涌入) by twins.