细胞毒性脑水肿最常见的最因是（）
A、炎症。
B、肿瘤。
C、脑缺血。
D、外伤。
E、脑出血。
参考答案：C
Linda worked for the Minnesota Manufacturing and Mining Company, ____ as 3M.[ ]
A. knowing
B. known
C. being known
D. to be known
