拱桥式、飞燕式功能锻炼常用于（）
A.颈椎骨折早期
B.骶椎骨折早期
C.骨盆骨折
D.单纯性胸腰椎骨折
E.脊椎后关节紊乱
参考答案：D
— Have you told Joan the bad news that her grandfather fell off the bike and hurt seriously?
— Yes. I told her ________I saw her this afternoon. [ ]
A. while
B. the moment
C. until
D. suddenly
柴油机工作时，柴油与空气在（）内混合。
A.喷油器
B.喷油泵
C.燃烧室
D.油管
