龈沟底在釉牙骨质界的根方，形成真性牙周袋，轻度牙周炎牙周袋深度小于或等于多少
A．2mmB．2.5mmC．3mmD．4mmE．6mm
参考答案：D
简述建立良好护患关系对护士有哪些要求?
—My ink has _____. Can you spare me some, please?
—Of course. Here you are.[ ]
A. used up
B. looked out
C. given up
D. run out
