单项选择题

以下选项中,为胰腺假性囊肿和潴留性囊肿的主要鉴别的点是( )

A．胰腺实质近主胰管附近较小无回声
B．囊肿可单发或多发
C．周围组织受压移位
D．无回声内有沉积物
E．边缘光滑的类圆形无回声

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单项选择题

18.Music can express attitudes and values by how it sounds. Which of the following music forms sound defiant, like an assault one the ears?

A．.Folk, Punk, and Rock.
B．.Punk, Heavy Metal, Rap.
C．. Country, Rap and Punk.
D．.Folk, Country and Pop.

《美学散步》的作者是（）

答案：宗白华