世界上的人不可能活到400岁．______（判断对错）
世界上的人不可能活到400岁，属于确定事件中的不可能事件；
故答案为：√．
医生给孕妇做B超，说明声波能够传递 ；医生用超声波除去人体内的结石，说明声波能够传递 。
Last year Jackie saved 5% of her annual salary. This year, she made 10% more money than last year, and she saved 8% of her salary. The amount saved this year was what percent of the amount she saved last year ？（）
A. 56%
B. 76%
C. 158%
D. 176%
E. 188%
