点状回声
参考答案:
点状回声:细小的亮点回声,直径通常小于0.2cm。
Your friend and adviser ____ agreed to lend me some money. [ ]
A. is
B. has
C. have
D. are
在电算化系统的应用中,硬件工作方式的选择依据是( )。
A.B和D
B.会计信息量
C.上级要求
D.企业规模