口咽部的恶性淋巴瘤的好发部位是()

A.软腭 

B.咽壁 

C.舌根 

D.扁桃体区 

E.咽腭弓

Which of the following is NOT a characteristic of the long-run industry supply curve（）

A. The long-run supply curve is less elastic than the short run supply curve.

B. The long-run supply curve is flatter than the short-run supply curve.

C. In the long run, there will be a greater change of quantity supplied for a given price change, than in the short run.