The Chinese football team had experienced a series of reforms. However, its performances in Shenzhen in October ________ all the people, especially the crazy fans.

A．knocked down

B．let down

C．pulled down

D．brought down

下列关于腮腺混合瘤的描述，哪项是错误的()

A．又称多形性腺瘤

B．为涎腺中发病率最高的良性肿瘤

C．肿瘤生长迅速，多不伴其他症状

D．发病多在一侧

E．与周围组织无粘连，可有一定限度的活动