海绵窦血栓性静脉炎常为下列哪些疾病的并发症（）
A.急性额窦炎
B.急性筛窦炎
C.急性蝶窦炎
D.急性上颌窦炎
E.鼻疖
参考答案：C, E
螺旋CT与普通CT相比具有的优点不包括（）
A.可显示较细微结构
B.扫描速度快
C.提高病变密度测量
D.可建重叠扫描层面
E.图像处理时间短
()divorce is often the only satisfactory solution for married couples who can no longer stand the sight of each other, it can have a shocking effect on their kids.
A. Since
B. While
C. As
D. Unless
