题目

 It came as ______ shock that ______ fire broke out in Shanghai yesterday, killing at least 5 people. A. /, a                          B. the, the                     C. a, a                         D. a, / 答案：C三棱柱的直观图和三视图(主视图和俯视图是正方形，左视图是等腰直角三角形）如图所永，则这个三棱柱的全面积等于_____________