下述哪项是卵巢肿瘤常见的并发症
A．蒂扭转B．囊肿破裂C．感染D．恶变E．破裂后腹膜炎
参考答案：A
—Have you ever _______ Paris before?
—Not yet. But I've planed to go there next month.[ ]
A. been with
B. been in
C. been to
D. gone to
备用制动手柄由几个档位组成？
