心包肿瘤的二维超声检查主要所见()
A.心包局部缺如
B.心室或心房内有肿物图像
C.心包显示不清
D.心包变薄
E.心包积液及/或心包填塞,心包上有团、块状回声
参考答案:E
The boy asked his father .
A.where it happens
B.when did it happen
C.what did it happen
D.how it happened
“一人为众,众为一人”的思想所体现的保险特征是()
A.经济性
B.互助性
C.法律性
D.补偿性