拉曼散射(Raman)
参考答案：光照导致的分子内振动能级跃迁而产生的分子极化过程。分子极化率越大，Raman散射越强。
下列有关韦格纳肉芽肿说法哪一项是正确的（）
A.典型的三联征是上下呼吸道和鼻窦炎症
B.中等血管病变为主的坏死性肉芽肿性炎症和血管炎
C.可有p-ANCA阳性
D.最常见的放射性特征是肺脏浸润性病灶和结节状阴影，可伴有局部的肺不张
E.临床肾损害少见
Don't make so much noise. The students _____ an English class. [ ]
A. are having
B. have
C. had
D. were having
