题目内容：
Space Wars
Space Weapons in Development
注意：此部分试题请在答题卡1上作答。
What precaution has the U. S. taken against potential nuclear attacks in the past twenty years?
参考答案：
答案解析：
单选题：Space Wars Space Weapons in Development 注意：此部分试题请在答题卡1上作答。
- 题目分类：英语六级
- 题目类型：单选题
- 查看权限：VIP
Space Wars
Space Weapons in Development
注意：此部分试题请在答题卡1上作答。
What precaution has the U. S. taken against potential nuclear attacks in the past twenty years?