急性心肌梗死并发症最大的可能是（）
A.心肌梗死后综合征
B.心室膨胀瘤
C.心脏破裂
D.栓塞
E. * * 肌功能失调或断裂
参考答案：E
One advantage of technical analysis is that it tells the analyst:（）
A. Why investors are buying.
B. When to buy and why investors are buying.
C. When to buy; not why investors are buying.
在OSI参考模型中，网桥实现互联的层次为 ( )。
A．物理层
B．数据链路层
C．网络层
D．高层
