单项选择题 潮州筝的特点是声情并茂，音韵变化微妙。特色技法是“双4”、“双7”和活五调的“双2”。

单项选择题 Identify the fallacy in the following statement: Every time the cheerleaders have worn blue ribbons, the basketball team has won. If the team wants to keep winning, the cheerleaders should continue wearing blue ribbons.

多项选择题 按钮的形状主要包括( )( )、( )( )、( )( )、( )( )、等。() A、矩形 B、圆形 C、胶囊形 D、圆角矩形