常引起脊柱不稳的脊椎骨折是（）
A.椎体前柱骨折
B.椎体中柱骨折
C.椎体后柱骨折
D.椎体压缩性骨折
E.以上都是
参考答案：B
Drugs can do great harm (危害) not only to you but also to your family. You must be _________them.
A．along with
B．out of
C．in front of
D．away from
肾表面出现多个宽大、边缘不整齐、切面呈楔形的瘢痕见于（）
A.慢性肾小球肾炎
B.肾动脉粥样硬化
C.多发性肾梗死
D.慢性肾盂肾炎
E.高血压病
