肩关节脱位约占全身脱位总数的()。
A.10%
B.40%
C.50%
D.80%
E.95%
参考答案:C
You ________ pay too much attention to your reading skill, as it is so important.[ ]
A. can't
B. should
C. must
D. needn't
腰膨大脊髓节段是()
A. C4-T1
B. C2-T2
C. C5-T2
D. L3一S2
E. L1一S2