胸壁无痛性软块,按之有波动,应首先考虑()
A.软组织的急性化脓性感染
B.胸壁结核
C.皮脂囊肿
D.胸壁肿瘤
E.以上都不是
参考答案:B
He had never spent a ____ day. [ ]
A. more worry
B. most worrying
C. more worrying
D. most worried
电渣焊的焊件均为()形坡口,因此节约大量焊接材料和坡口加工的时间。
A.Y
B.V
C.I
D.U