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奇怪了,我看大家的答案贴,很多人都选C啊,为什么答案中又是贴的E呢?
我选C哈,同意的举右手,不同意的欢迎举左手并列理由
28: Rock samples taken from the remains of an asteroid about twice the size of the 6-nuke-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.
A: has been dated to be 3.47 billion years old and thus is
B: has been dated at 3.47 billion years old and thus
C: have been dated to be 3.47billion years old and thus are
D: have been dated as being 3.47 billion years old and thus
E: have been dated at 3.47 billion years old and thus are | 
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发表于 2005-12-15 02:10:00
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