s ________：to happen at the same time or to move at the same speed as something
举一反三
- 中国大学MOOC: give something to each other at the same time
- 中国大学MOOC: Two spaceships move with same speed 0.80c relative to the Earth, but in opposite directions. What is the speed of one ship relative to the other? (c is the speed of light in vacuum)
- Suppose that demand for a good increases and, at the same time, supply of the good decreases. What would happen in the market for the good?
- If infants learn two languages at the same time, they will have a sense of confusion, thus hindering the speed of the language learning.
- Two spaceships move with same speed 0.80c relative to the Earth, but in opposite directions. What is the speed of one ship relative to the other? (c is the speed of light in vacuum) A: 0.80c B: 0.976c C: 0.994c D: 1.60c