政府债务收入规模的衡量指标有( )。
A．国债依存度
B．国债负担率
C．国债总额
D．人均国债额
E．国债偿债率
参考答案：A,B,E
成人股骨颈的血液供应主要来源于
A．股骨头圆韧带内的小凹动脉
B．旋股内、外侧动脉分支
C．旋股内动脉
D．旋股外动脉
E．股骨干的滋养动脉
The idea puzzled me so much that I stopped for a few seconds to try to________.[ ]
A. make it out
B. make it off
C. make it up
D. make it over
