单项选择题

Questions 26 to 28 are based on the passage you have just heard.

A．It preserves the vitamins.
B．It breaks down the vitamins.
C．It makes the meat easier to digest.
D．It reduces the protein content.

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单项选择题

单项选择题

Questions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。