每张图纸都必须绘制会签栏，会签栏的位置位于图纸的右下角。
参考答案：错
按收益保障性分类，结构化金融衍生产品可分为保本型和保证最低收益型产品。（）
----- My son was admitted to a key university last year.
----- Congratulations! His hard work finally ________,
A．paid for
B．paid off
C．paid back
D．paid attention
