—  What about the little wood near West Hill Farm?

— Good. That is an ideal ____ for a picnic. [ ]

A. spot    

B. condition  

C. situation    

D. area

慢性龈炎沟内上皮深层的炎性细胞浸润主要是

A．中性粒细胞

B．浆细胞

C．T淋巴细胞

D．B淋巴细胞

E．巨噬细胞