桥体的龈面材料最好适用
A．热凝塑料
B．树脂
C．金属
D．烤瓷
E．自凝塑料
参考答案：D
The last time we had great fun was _____ we were visiting the Water Park.[ ]
A. where
B. how
C. when
D. why
疑为骨盆骨折的患者来院急诊，最首要的检查应是
A．X线片
B．MRI
C．核素骨扫描
D．肛门指诊
E．CT
