重型多片矩形母线的安装中，母线与设备连接处采用（），连接的截面不应（）母线的截面．
参考答案：软连接；小于
Last year, Linda made __________ her brother did though he had a better job. [ ]
A. twice as much money as
B. twice as many money as
C. two times money more than
D. twice more money as
男，26岁，左腰痛伴下肢痛1个月加重5天，不伴下肢麻木、乏力，X线平片示腰椎曲度变直，轻度退行性改变。
为明确诊断进一步检查最好是作（）。
A.MRI检查
B.脊椎静脉造影
C.脊髓造影
D.B超
E.硬膜外造影
