梭形动脉瘤
参考答案：梭形动脉瘤 梭形动脉瘤的病变累及主动脉全周，长度不一，瘤壁厚薄不均。动脉瘤壁及邻近主动脉可有钙化，主动脉内壁可附有血栓。
—Mom, can I leave my homework for tomorrow?
—I'm afraid not. Don't _______ what you can do today till tomorrow. [ ]
A. put on
B. put down
C. put up
D. put off
