With an appropriate preposition: After about six years inside a

分类: 英语语法(00831) 发布时间: 2024-08-22 09:52 浏览量: 0
With an appropriate preposition: After about six years inside a reactor, nuclear materials are usually moved to a fuel pool to let their radiation die___________.
【正确答案】:out
【题目解析】:die out  灭绝,消失