Thought to be made from a cattle femur, this decorated Anglo-Saxon spindle whorl, used to provide weight while spinning yarn, was unearthed from farmland near Bishopstone, Buckinghamshire.
– Choose an an appropriate window frame style for the location, keep the view consistent to the aspect ratio, rather than creating a collage.
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// 易错点4:栈空时要存-1(题目要求无更大值返回-1),而非直接存stack2.at(-1)(会得到undefined)