固有衰减
参考答案：
衰减常数与电缆长度的乘积。
诊断鼻窦霉菌的最佳检查方法是（）
A.平片
B.CT平扫
C.CT增强扫描
D.MRI
E.B超
The opening province which _____ thirteen counties and three coastal cities will quicken its paces of
economic development. [ ]
A. consists of
B. makes up of
C. is included
D. is contained
