下列与舌杆有关的叙述错误的是（）

A.舌杆剖面呈半梨形，上缘薄下缘圆钝

B.舌杆上缘与龈缘平齐

C.斜坡形舌侧牙槽嵴，舌杆离开粘膜少许

D.垂直形舌侧牙槽嵴，舌杆与粘膜轻接触

E.倒凹形舌侧牙槽嵴，舌杆应尽量设计在倒凹以上

If you do not know how to _____ yourself at table in a foreign country, you should copy the host.[      ]

A. dress        

B. tell              

C. show        

D. behave