—What’s the matter with you, Tom?

—______ the ladder, one of arms has been broken.

A．Climbing

B．While climbing

C．To climb

D．While I was climbing

下列选项中，不是化脓性脑脓肿CT表现的是（）

A.可有占位效应

B.强化环完整、均匀、光滑

C.可见气液平

D.强化环厚薄不均

E.周围可有低密度水肿