企业融资租赁的种类有（）。
A.经营租赁
B.直接租赁
C.融资担保
D.杠杆租赁
E.售后回租
参考答案：B, D, E
It began to rain ________ we were walking on the street.[ ]
A. when
B. then
C. while
D. because
腰椎管狭窄的CT诊断标准为正中矢状径小于（）
A.11mm
B.12mm
C.13mm
D.14mm
E.15mm
