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  3. What is Alvin? In what aspects are the new HOV and Alvin different?

What is Alvin? In what aspects are the new HOV and Alvin different?

admin2009-06-15  68
问题 What is Alvin?
In what aspects are the new HOV and Alvin different?
选项 A、Offering better views.
B、Speed.
C、Size.
D、Both A and Ｂ.
答案D
解析 第三段最后两句告诉我们，Alvin只有三个窗户，而HOV有五个。最后一段告诉我们，两艘潜水装置的上下活动速度和行进速度有所差别。所以D是正确选择。
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