三视图属于（）。
A、斜视图
B、基本视图
C、局部视图
D、剖视图
参考答案：B
He traveled to many mountain villages and saw many poor children out of school. This experience _____ his life. [ ]
A. would change
B. had changed
C. was to change
D. was changing
真正的友谊是建立在“哥们儿义气”的基础上。[ ]
