吊钩的工作截面磨损超过原截面高度的（）%、吊钩钩身任何部位有（）和吊钩产生永久（），均应报废不得继续使用。
参考答案：10、裂纹、变形
商店都以600元的价格卖出两件上衣，其中一件赚了25%，另一件亏了25%，结果是（ ）
A．不亏也不赚
B．赚了60元
C．亏了80元
D．亏100元
(71) is true regarding simple sort techniques.
A．Both insertion sort and selection sort require O(n)moves.
B．Exchange sort is frequently referred to as a bubble sort.
C．If random data are in an array that is to be sorted, an insertion sort will give the best performance for large elements with small sort items.
D．Exchange sort is the least expensive.
