3215÷815,
=3215×158,
=4(千米).
答:以此速度小杰1小时可以走4千米.
— What happened to Tom yesterday?
— Well, he was walking in the street when a stone flew up and hit _______.
A.him in the head
B.him in his head
C.him on the head
D.the head
在IMARSAT中,有4个通信优先等级,其中.priority2表示:()
A、日常通信
B、安全通信
C、紧急通信
D、遇险通信