中国大学MOOC: Life has two opposite poles: one is to hold fast to life and the other is to let ________of it.
举一反三
- 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)
- 中国大学MOOC:"David likes country life and has decided to ______ farming.";
- It is common practice a battery when it still has some life in it.
- It is common practice( )a battery when it still has some life in it.
- 中国大学MOOC: The doctors instructions must be _________ exactly; the sick man’s life depends on it.