起自牙槽嵴顶，呈放射状向牙冠方向走行，将牙向牙槽窝内牵引的是( )
A．牙槽嵴组B．水平组C．斜行组D．根间组E．根尖组
参考答案：A
工程造价的( )性首先表现在它具有两种含义，其次表现在工程造价构成因素的广泛性和复杂性。
A．兼容
B．综合
C．浮动
D．调节
Much of the farm is under water, _____ the grain, most of that has been ruined. [ ]
A. owing to
B. thanks to
C. as for
D. as with
