单项选择题

A great difference between men and women is that ______.

A．women have two chromosomes but men have only one
B．women have two cell lines but men have only one
C．women can choose from two chromosomes but men cannot
D．women can choose from two cells but men cannot
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单项选择题
Poor parenting skills do NOT include______.
A．asking children to fight back if anyone attempts to hurt them
B．failing to guide and discipline children
C．ignoring children's attitudes and behaviour
D．spending some time with children after work
单项选择题
We know from the passage that______.
A．job demands prevent parents from assisting schools in educating their children
B．poor parenting mostly exists in families with financial difficulties
C．poor parenting contributes to school violence
D．parents and schools should help each other in educating children
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