与出血性疾病发病无关的是（）。
A.血管壁异常
B.生理性抗凝蛋白缺乏
C.凝血功能缺陷
D.血小板功能减低
E.血小板数量减少
参考答案：B
255. Keith just shrugged his _____ and said it wasn’t his problem.
A．shoulder
B．shoulders
C．arms
D．Bodies
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