零件局部视图的断裂线边界用（）表示。
A、细实线
B、点画线
C、粗实线
D、波浪线
参考答案：D
Andrew often attempts to escape whenever he breaks traffic regulations. [ ]
A.having been fined
B.to have been fined
C.to be fined
D.being fined
明初四杰是（）
A.高启
B.杨基
C.张羽
D.袁凯
