如图，为胎儿一大血管结构，图中为弧形并可见分支的管道结构称为______。
参考答案：主动脉弓
Her face suggested that ____. [ ]
A. she was in poor health
B. her health was poor
C. her body was not healthy
D. her body was ill
下列哪种疾病最易损坏筋膜（）
A.蛇眼疔
B.蛇头疔
C.红丝疔
D.锁口疔
E.蛇肚疔
