【简答题】After almost 30 years of arguing that a black hole swallows up everything that falls into it, British astrophysicist (天体物理学家) Stephen Hawking moved backward last week. The world-famous writer of 'Brie...
【简答题】where is he going to? 2.what's the arrived time? 3.what's the borading time? 4. what's the departure time? 5. can it expose to excessive heat or direct sunlight?