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
参考答案:D
—He should have come to join in the thorough cleaning.
—He ________, I think. It's not his turn.
A.needn't have to
B.needn't have
C.didn't have to
D.doesn't need to
食品工厂设备包括那三类?