In pictures, many of the twins strike nearly identical ____(姿势) .
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The twins often have surprisingly similar gestures and ____(姿态) , for instance.
To measure personality, the psychologists try to determine things like how much the twins worry, whether they are cautious or ____(鲁莽的), and how creative they are.
When they were ____(重新团聚) at the age of 39, they discovered a series of striking similarities.
But most ____(使人惊讶地), the Minnesota team finds that genes play a big part in shaping our personalities-helping to determine whether we respect tradition and like to follow rules, for example, or whether we're dedicated nonconformists.