以波幅变化反映回波情况的超声诊断类型属于
A.A 型
B.B 型
C.D 型
D.F 型
E.M 型
参考答案:A
I'll never understand how it _____ that he still insisted on going there alone after being told about the
possible danger. [ ]
A. came about
B. came across
C. came out
D. came up
早期真菌斑多为()。
A、黑色丝状
B、黑色絮状
C、白色絮状
D、绿色絮状