问题
单项选择题
确定一起事件是否为疾病暴发，需明确（）
A、病例是否由于共同的病原而致病
B、时间上是否呈聚集性特征
C、空间上是否有聚集特征
D、上述均对
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
确定一起事件是否为疾病暴发，需明确（）
A、病例是否由于共同的病原而致病
B、时间上是否呈聚集性特征
C、空间上是否有聚集特征
D、上述均对
参考答案：D
| 35．Applications put computers to pratical business (1) , but below the (2) it’s the heart of an operating system—the kernel that provides the technical wizardry to juggle multiple program, connect to networks and store (3) . A traditional kernal provides all the functions for applications. The kemal (4) memory, I/O devices and parcels out processor time. The kernel also supports security and fault (5) , which is the ablity to recover automatically when parts of the system fail. |
(5)
A．addition
B．combination
C．difference
D．condition