They are encouraged to do maintenance for the training centre.
Most of them get paid for their work.
They have to cook their own meals.
They can choose to do community work.
已知某国国际收支平衡表中，经常项目差额160亿美元，资本和金融项目差额为-100亿美元，误差与遗漏为1o亿美元，则该国储备资产增减额为（ ）。A.70亿元 B.-70亿美元 C.+60亿美元 D.+270亿美元
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