卵巢肿瘤蒂扭转的主要症状是（）
A.急性腹痛
B.发热
C.恶心、呕吐
D.白细胞数升高
E.休克
参考答案：A
_____several times，but unfortunately，the boy still couldn’t smooth away the problem on his own.
A．Having been explained
B．The problem having been explained
C．The problem had been explained
D．Although the problem had been explained
与回肠相比，空肠的解剖特点，下列哪项是错误的
A．部分位于左上腹B．蠕动较活跃C．肠腔相对较粗D．黏膜常呈羽毛状E．黏膜皱襞较少
