单项选择题

A．It helps improve their safety.
B．It allows them to swim faster.
C．It helps them fight their predators.
D．It allows them to avoid twists and turns.
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单项选择题
A．Because the Americans found they were from Germany.B．Because people thought they contained dog meat.C．Because people had to get used to their taste.D．Because it was too hot to eat right away.
A．Because the Americans found they were from Germany.
B．Because people thought they contained dog meat.
C．Because people had to get used to their taste.
D．Because it was too hot to eat right away.
问答题
Amazon puts searchable digital data from mostly__________.
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