He stopped _______christmas cards a few yesrs ago,so he received almost none.

A．to send

B．sending

C．send

D．to be sending

喉和喉咽部CT检查方法正确的有（）。

A.层厚和层间距5mm

B.摄取侧位定位片基线与声带平行

C.仰卧、下颔上抬

D.范围自舌骨上会厌下缘至环状软骨上缘

E.扫描时不能做吞咽动作和讲话