试题与答案

耳屏前形成的皮肤盲管可能是由于() A.第一鳃沟发育异常 B.第三鳃弓发育异常 C.

题型:单项选择题

题目:

耳屏前形成的皮肤盲管可能是由于()

A.第一鳃沟发育异常

B.第三鳃弓发育异常

C.第三鳃沟发育异常

D.第四鳃弓发育异常

E.面突发育异常

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:免疫防御是指机体排斥微生物的侵袭及其他外源性抗原异物的能力,此种功能过高易产生过敏反应,过低引起免疫缺陷病;免疫自稳是指机体识别和清除自身衰老破损组织的能力,藉以维持内环境稳定,此...

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