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问题 单项选择题

下列关于FR酚醛树脂渗透作用的叙述最确切的是

A．仅渗入主根管

B．渗透性弱

C．仅渗入主根管和侧根管

D．可渗入主根管和侧根管及牙本质小管

E．能渗入主根管的颈中1/3

答案

参考答案：D

选择题

—Jack called to say that he would not accept the job.

—I had talked him into taking it up many times.________ since he still refuses.

A．I'll come to his help

B．I can't help it

C．I'll talk it over with him

D．I'll phone him up
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单项选择题

骨折愈合的最终阶段应是（）

A.骨性骨痂形成

B.骨改建

C.纤维性骨痂连接

D.骨样组织中有钙盐沉着

E.完成了软骨化骨过程
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