I can hardly hear the radio. Would you please _________

A．turn it on

B．turn it down

C．turn it up

D．turn it off

最常见的"颞下窝原发肿瘤"为（）

A.鼻咽癌

B.腮腺肿瘤

C.脑膜瘤

D.肉瘤或未分化癌

E.淋巴瘤