What is the most important factor for a rocket to escape from the Earth? When a bicycle "coasts" downhill, it ______.

admin2009-06-15  48

问题 What is the most important factor for a rocket to escape from the Earth?
When a bicycle "coasts" downhill, it ______.

选项 A、runs along the hillside
B、does not need any further power
C、runs freely to all directions
D、does not meet with air resistance

答案B

解析
转载请注明原文地址:https://kaotiyun.com/show/Lc2d777K
0

最新回复(0)