在城市市区内建设工程，施工单位应当对施工现场实行封闭围挡。
参考答案：对
The project ________ by the end of 2012,will expand the city's telephone network to cover
2,000,000 users.[ ]
A. being accomplished
B. to be accomplished
C. accomplished
D. having been accomplished
骨折的常见类型包括（）
A.隐匿骨折
B.斜行骨折
C.螺旋骨折
D.粉碎骨折
E.横行骨折
