可作3/4冠修复的情况是
A．切缘有较小的缺损
B．舌面有广泛龋
C．邻面有较大的缺损
D．扭转前牙
E．死髓牙
参考答案：A
________ from space, the earth , with water_______ seventy percent of the surface , looks like a blue ball.
A．Seen ; covered
B．Seen ; covering
C．seeing ; covering
D．Seeing ; covering
最小塔板数
; covering