MCQOPTIONS
Saved Bookmarks
| 1. |
In December 2019, researchers in which country have improved the accuracy of detecting space junk in the Earth's orbit, providing a more effective way to plot safe routes for spacecraft? |
| A. | USA |
| B. | Japan |
| C. | China |
| D. | Russia |
| E. | UK |
| Answer» D. Russia | |