单项选择题

A．Weakened short-term memory.
B．Weakened strength.
C．Poor decision-making ability.
D．Poor concentration.
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单项选择题
A．An alloy of copper and silver.B．Pure silver or pure gold.C．An alloy of copper and tin.D．An alloy of gold and silver.
A．An alloy of copper and silver.
B．Pure silver or pure gold.
C．An alloy of copper and tin.
D．An alloy of gold and silver.
问答题
__________is a stable way to help homeless children or youth get rid of poverty.
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