补体激活后,形成的膜攻击复合物是
A.C 3bnBbp
B.C56678
C.C5667
D.C4b2b3b
E.C5b6789
参考答案:E
Fair and () competition in government procurement around the world is good business and good public policy.Competitive pricing,product () and performance improvements result from competitive practices and help ensure that government authorities get the best () for the public they serve.
And help ensure that government authorities get the best () for the public they serve.
A.help
B.server
C.value
D.policy
患者女性,30岁,因“双耳听力进行性下降10余年”来诊。自诉在超市或人多的地方听力有所改善。入院专科检查:双耳鼓膜完整,标志清晰,透过鼓膜可见鼓室后方呈淡红色,纯音测听提示传导性耳聋。
确诊需要的客观检查除外()
A.声导抗检查
B.颞骨CT平扫
C.颅脑MRI平扫+增强
D.耳声发射
E.听性脑干反应