单项选择题

Questions 20 and 21 are based on the following news. At the end of the news item, you will be given 20 seconds to answer the questions. Now, listen to the news. German technology conglomerate Siemens showed its new mobile phones

A．at a news conference.
B．at a mobile trade show.
C．at a mobile handset unit.
D．at a mass market.

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单项选择题

单项选择题

Questions 20 and 21 are based on the following news. At the end of the news item, you will be given 20 seconds to answer the questions. Now, listen to the news. German technology conglomerate Siemens showed its new mobile phones 您的浏览器不支持 audio 元素。