单项选择题

A．Why obesity can cause birth defects.
B．How obesity may cause birth defects.
C．Why obesity can cause diabetes.
D．How obesity may cause diabetes.
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单项选择题
The scientists find the proxy to be ___________.
A．the role of culture
B．the passage of time
C．the structure of a skull
D．the biological makeup of the brain
单项选择题
When we say that antisocial and criminal behavior tends to run in families, as indicated by the recent findings, we can probably mean that ___________.
A．a particular gene is passed on in families
B．child abuse will lead to domestic violence
C．the male victims of child abuse will pass on the tendency
D．the violent predisposition is exclusively born of child abuse
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