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Questions 19 to 22 are based on the conversation you have just heard.

A．It focuses automatically.
B．It has a lot of specialized lenses.
C．It is easy to load.
D．It advances the film automatically.

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单项选择题

单项选择题

Questions 19 to 22 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。