It is worth considering what makes “convenience” foods so popular，and ________better ones of your own.

A．introduces

B．to introduce

C．introducing

D．introduced

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