与回肠相比，下列空肠解剖特点，哪项不对（）
A.大部分位于左上腹
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
参考答案：E
婴幼儿硬膜下血肿的治疗方法是（）。
A.颅骨钻孔引流
B.行开颅血肿清除术
C.前囟外侧角穿刺抽吸血肿
D.腰穿排放积血
E.高渗药物保守治疗
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New
China's nuclear, missile and so on. [ ]
A. would have been unthinkable
B. would not be unthinkable
C. would be unthinkable
D. would not have been unthinkable
