对于成组叶片A0型振动,其高频共振安全率应不低于()%
A.±8
B.±15
C.±12
D.±5
参考答案:A
_______ about the loss of Malaysia Flight MH370 keep everyone worried. I wish we could find the_______ of the accident as soon as possible.
A.News; excuse
B.Information; result
C.Messages; cause
D.Advice; influence
完全截瘫的急性脊髓炎患者伴尿失禁,4天后发现骶部皮肤小片无痛性红肿区,无溃破,无发热。
该骶部小片区最可能的处于早期的疾病是()
A.丹毒
B.疖肿
C.结核
D.骨髓炎
E.压疮