限界为保证行车安全，对机车、车辆、线路、邻近建筑物及设备所规定的不许超越的轮廓尺寸线。
参考答案：对
The traditional approach with complex problems in our studies is to break them down into smaller,more easily managed problems.[ ]
A. to deal
B. having dealt
C. to dealing
D. being dealt
聚碳酸酯的应力-应变曲线属以下哪一类（）
A、硬而脆
B、软而韧
C、硬而韧
