在居住建筑中，使用最广泛的木门是（）。
A.推拉门
B.弹簧门
C.转门
D.平开门
参考答案：D
– When did you graduate from college?
– It was in 2003 ____ you were in middle school.
A．that
B．when
C．which
D．then
骨转移性肿瘤的X线表现有哪些?
