下列舌象的表现不属于有根苔的是

A．舌苔中厚边薄，紧贴于舌面
B．苔底牢着
C．舌苔松厚，刮之舌面仍有苔迹
D．舌苔似有似无，甚则光剥如镜面
E．厚苔脱落，舌面仍有黏膜颗粒，有苔能逐生之象

A cofferdam is（）.

A.any deck below the main deck and above the lowest deck

B.a member that gives fore-and-strength

C.made by placing two bulkhead a few feet apart

D.a heavy fore-and-aft beam under the deck