单项选择题

下面的美国手语字母是。

A、C
B、K
C、G
D、D

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Which of the following statements about group buying is incorrect?

A．The varieties of group-buying products are limited.
B．Group buying is generally conducted in local groups with a small range of choices.
C．The development of group buying is promising and will not be affected by the declining price sensitivity of consumers.
D．Group buying can reduce transaction costs and expand market share for enterprises.

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photoshop生成的文件默认的文件格式扩展名为（ )。 A.
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