牙周炎在X线片上表现为A．牙槽骨密度降低 B．骨硬板呈白线 C．

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问题单项选择题

牙周炎在X线片上表现为

A．牙槽骨密度降低

B．骨硬板呈白线

C．牙周膜呈黑线

D．前牙牙槽嵴顶尖锐

E．根尖周骨密度减低

答案

参考答案：A

解析：牙周炎时X线片上会表现为牙槽骨密度降低。其它选项内容都不是牙周炎的表现。

填空题

语法填空

Frederick William I, the king of Prussia, would never have imagined that his greatest gift 1._________

the Russian people would have such an 2.(amaze)_____________ history. This gift was the Amber

Room, 3.____________ was given this name 4._______________ several tons of amber were used to make 5._____________.

The amber which 6.(select)______________ had a beautiful yellow-brown colour 7.___________

honey. The design of the 8.________________ was in the fancy style popular in those days. It was also

a treasure 9.(decorate)________________ with gold and jewels, which took the country's best artists

about ten years 10. (make)_______________.

多项选择题

单位客户对账按对账方式分为（）。

A、纸式对账

B、电子对账

C、电话对账

D、上门对账