it travels 300,000 kilometres a second是什么意思
it travels 300,000 kilometres a second是什么意思
Light travels 300,000 kilometres a second
it travels 300000km a second是什么意思
Light----[ travel]300,300 kilometres a second
The spaceship flies at 11 kilometres a second.划线提问
a second是什么意思
a train travels 70 feet in 1/10 second.At this s
light travels是什么意思?
英语 单选light travels very fast,_____ 300,000 kilometers a seco
1.It‘s a long_to Pairs.It's two thousand kilometres.Astreet
about two kilometres away 是什么意思
It goes at 30kilometers a second