轴承6308，其代号表示的意义为（）。
参考答案：6：深沟球轴承、3：直径代号，08：内径为Φ40
What a pity! I missed meeting my friend at the airport because my car was ________ in the traffic jam. [ ]
A. broken up
B. held up
C. kept back
D. kept up
腹腔-分流手术的并发症有（）
A.分流管堵塞
B.感染
C.分流管依赖
D.气颅
E.脑神经损伤
