牙本质所含无机物约占重量的
A．90%B．80%C．60%D．70%E．50%
参考答案：D
—What if I move the picture over there？Do you think it’ll look better?
—________.Let me give you a hand.[ ]
A. I don’t agree with you
B. That’s right
C. I couldn’t agree more
D. With pleasure
正常淋巴结的形状及横径是（）
A.圆形，<2mm
B.长形，>6mm
C.豆状，5mm
D.卵圆形，<4mm
E.条形，>6mm
