脊髓损伤后自主神经反射异常的最常见原因是（）
A.膀胱结石
B.痉挛
C.膀胱膨胀
D.压疮
E.泌尿系统感染
参考答案：C
— English has a large vocabulary, hasn't it?
— Yes. _____ more words and expressions and you will find it easier to read and communicate.[ ]
A. Know
B. Knowing
C. To know
D. Known
运用经济基础和上层建筑辩证关系的原理说明把依法治国和以德治国结合起来的重要意义。
