周长=____
Don't worry. Your package ____ (keep) here until you come back, so enjoy shopping here.
时刻t/s
1.0
2.0
3.0
5.0
7.0
9.0
10.0
速度v/(m•s﹣1)
6.0
12.0
请根据表中的数据通过分析及计算求出:
对于人失去听觉,下列说法不正确的是( )