What might you do the first when you have to introduce yourself to a new colleague（）
A. Give a sweet smile
B. Extend your hand and hello
C. Ask someone else to introduce you
D. Extend your best wishes
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Where should mother turn left（）
A. Traffic lights
B. At the theater
C. At the cinema
D. At the corner
Which of the following statement is true（）
A. Greetings and introductions are of great importance in US culture
B. People needn’t pay too much attention to greetings and introductions
C. Introducing oneself is more commonly used than being introduced to others
D. People needn’t introduce others on many occation
Why didn’t mother turn right at the first turning（）
A. Because the road was being reconstructed
Because it was a one-way street
C. Because there was a traffic jam there
D. Because there was a traffic accident
下列哪种说法正确描述了 Cisco Catalyst 2960 交换机的特征（）
A. 它们不支持 IOS 版本早于 15.x 的活动交换虚拟接口 （SVI）
B. 它们最适合用作分布层交换机
C. 它们是模块化交换机
D. 新型 Cisco Catalyst 2960-C 交换机支持 PoE 透传
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