下列属急性扁桃体炎并发症的有()。
A.急性中耳炎
B.急性气管支气管炎
C.急性淋巴结炎
D.扁桃体周围脓肿
E.急性风湿热
参考答案:A, B, C, D, E
Kate knew nothing about it _____ I told her. [ ]
A. since
B. because
C. until
D. after
在自动闭塞电气化区段上,单根更换钢轨时,应对轨道电路先做哪些准备工作,方能开始更换?