白内障手术球后麻醉可能会发生（）
A．球后出血
B．CRVO／CRAO
C．穿破后巩膜
D．视神经损伤
参考答案：A, B, C, D
I _____ this book for two weeks. I have to return it now. [ ]
A. borrowed
B. have borrowed
C. kept
D. have kept
"2000"定额（以下简称新定额）与"93"定额（以下简称原定额）载适用范围上有什么不同？
