脊柱前凸常见的原因有()
A.脊椎骨软骨炎
B.大量腹水
C.脊椎结核
D.腹腔巨大肿瘤
E.晚期妊娠
参考答案:B, D, E
I am sure David wiU be able to find the library-he hasa good of direction. [ ]
A. idea
B. feeling
C. experience
D. sense
Visual FoxPro常量数据类型包括( )种。
A.3
B.4
C.5
D.6