火焰加热方式有（）。
A.点状加热
B.线状加热
C.三角形加热
参考答案：A, B, C
--- What should I do with my paper, Mr. Jason? --- Well, what I have said about
Peter’s _____ yours. [ ]
A. goes for
B. goes through
C. goes up
D. goes over
绘制箭线网络图有哪些规则？（网络图、关键路线、项目工期）
