答案:B
切面(断层)厚度伪像也称部分容积效应伪像,与其有关的是()
A.超声束较宽,过厚
B.超声发射频带过宽
C.超声传播声速失真
D.超声增益调节较低
E.超声发射的重复频率过低
Every week, we have classes ______ Monday to Friday. [ ]
A. on
B. to
C. from
D. with