股骨颈骨折可能并发（）
A．动、静脉损伤
B．周围神经损伤
C．缺血性肌挛缩
D．缺血性骨坏死
E．损伤性骨化
参考答案：D
—Do they have________seals in the zoo?
—No, but they have________sharks. [ ]
A. any; some
B. some, any
C. any; any
D. some; some
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