男孩，4岁，坠床后发现肘关节肿胀、疼痛，最可能的骨折是A．孟氏骨折 B．桡骨颈骨折

When Nancy was at college, she ____ three foreign languages, but I am surprised to find that  she ____ all except a few words of each.

A．spoke; had forgotten

B．had spoken; had forgotten

C．spoke; has forgotten

D．had spoken; has forgotten

神经纤维瘤病患者最常见和最有诊断意义的合并症或合并出现的征象是

A．Lisch结节

B．骨纤维结构不良

C．牛奶咖啡斑

D．胫骨假关节

E．颅面骨畸形

患者男性，75岁，心电图显示钉样起搏信号后紧跟心房除极波，并经自身的房室结下传，起搏模式为（）。

A.VAT

B.VVI

C.AAI

D.DDD

E.VVT

爱德华·伯尼斯