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Black holes are part of space. Black holes exist but are difficult to observe.
Black holes are part of space. Black holes exist but are difficult to observe.
admin
2009-01-21
41
问题
Black holes are part of space.
Black holes exist but are difficult to observe.
选项
A、Right
B、Wrong
C、Not mentioned
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/3jQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
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