根尖周肉芽肿内上皮可能来源于
A．Serres上皮剩余
B．Malassez上皮剩余
C．口腔黏膜上皮
D．呼吸道上皮
E．牙周袋壁上皮
参考答案：A
--They all agree ___George.Has the project been passed?
--Who ___ George can make the final decision?
A．except, except
B．except, besides
C．but, but
D．besides, but
电流互感器串联在主电路中
