单项选择题

According to the discussion, at what speed is the Internet growing

A． At a very steady speed.
B． At a very rapid speed.
C． At a very slow speed.

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单项选择题

A． Router and firewall.
B． Bandwidth and user friendliness.
C． Speed and security.

填空题

According to the discussion, at what speed is the Internet growing 您的浏览器不支持 audio 元素。