2. 外语
  3. The walrus uses its tusks to dig food from the ocean bottom.

The walrus uses its tusks to dig food from the ocean bottom.

admin2012-07-30  6
问题 The walrus uses its tusks to dig food from the ocean bottom.
选项 A、floor
B、environment
C、islands
D、waves
答案A
解析 底部
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