固定义齿修复中，固定桥最常用的固位体是（）
A.3/4冠
B.桩冠
C.全冠
D.套筒冠
E.精密附着体
参考答案：C
______ about wild plants that they decided to make a trip to Madagascar for further research [ ]
A. so curious the couple was
B. So curious were the couple
C. How curious the couple were
D. The couple was such curious
工程管线干线的综合管沟敷设，应将其设置在( )下面。
A．人行道 B．非机动车道 C．机动车道 D．绿化草坪带
