1小时=60分，
15÷60=14；
4吨=4000千克，
250÷4000=116．
故答案为：14，116．
We have to __________ some practical measures to solve the problem. [ ]
A. come out
B. come up with
C. come up
D. come about
运行中的断路器，发现下列故障之一时，禁止将其断开，以免发生爆炸事故？
