It is implied in the passage that the primary difficulty in seeking a safe way to dispose of nuclear wastes is caused by______

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问题 It is implied in the passage that the primary difficulty in seeking a safe way to dispose of nuclear wastes is caused by______
Hot containers of nuclear wastes to be put in Antarctic region would______

选项 A、remain above ice sheets
B、be safe to environment
C、be highly probable
D、remain under sea

答案D

解析 最后一段最后一句提到,一种方法是将存放核废料的热容器放在南极地区,它会将冰融化而沉入海底。
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