单项选择题

青春期龈炎一般表现为

A．好发于后牙
B．好发于舌（腭）侧牙龈
C．常伴有附着丧失
D．炎症程度与牙石量不成正比

你可能感兴趣的试题

单项选择题

鉴定物质的组成属于：（）。 A. 定性分析 B. 定量分析 C. 结构分析 D. 化学分析

单项选择题

Suppose a typical worker in France can produce 32 units of product in an eight-hour day, while a typical worker in Germany can produce 30 units of product in a 10-hour day. We can conclude that
A、worker productivity in Germany is higher than in France.
B、the standard of living will likely be higher in France than in Germany.
C、productivity is 4 units per hour for the German worker and 3 units per hour for the French worker.
D、there will be no difference between the standard of living in France and Germany.