The successful launch of Tiangong1 symbolizes a further step for China to join in the________of space stations previously mastered by Russia and the US.
| A．invention | B．production |
| C．operation | D．preparation |
推荐试卷
The successful launch of Tiangong1 symbolizes a further step for China to join in the________of space stations previously mastered by Russia and the US.
| A．invention | B．production |
| C．operation | D．preparation |
试题篮
()
粤公网安备 44130202000953号
