最新提问
我的动态
登录后查看动态
题目内容双击单词支持查询和收藏哦～
Most spacecraft are still at little risk of collision with space debris during their operational lifetimes, but given the numbers of new satellites launched each year,the orbital environment in the future is likely to be less _____.
- A.crowded
- B.invulnerable
- C.protected
- D.polluted
- E.benign
E显示答案
以上解析由 考满分老师提供。
