下列哪个特性不是虚拟化的主要特征（）
A.高扩展性
B.高可用性
C.高安全性
D.实现技术简单
参考答案：D
.
The teaching building is _________ by many trees, some ______ over 30 metres.
A．surrounded, measuring
B．surrounded, measured
C．surrounding, measured
D．surrounded, measure
对“易发生差错的药品”，调配室采取的最有效措施是
A．专柜加锁B．摆在调配台前方C．摆在调配台最远处D．摆在调配药师方便取拿处E．货架加贴醒目的警示标签
