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问题 单项选择题

患者女性，72岁，听诊心率75次／分，律齐。心电图检查不可能出现以下何种改变（）

A.窦性心律

B.心房颤动伴第三度房室传导阻滞

C.心房扑动4：1传导

D.阵发性房性心动过速2：1传导

E.完全性左束支传导阻滞

答案

参考答案：B

问答题 简答题

配线用钢管与设备连接时，对不能直接进入设备内容的应如何处理？
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单项选择题

The kernel is the (66) of an operating system such as Windows98, Windows NT, Mac OS or Unix. The kernel provides basic services for the other parts of the operating system, (67) it possible for it to run several programs at once (multitasking), read and write files and connect to networks and peripherals. Applications and utility programs use the services provided by the kernel to provide practical business functionality.

In operating systems such as Windows or most versions of Unix, the kernel (68) everything except application and utility programs.

In microkernel operating systems such as Digital Unix and Apples forthcoming Mac OS Server, the kernel (69) supports only multitasking and memory management. Other services such as applications, utilities and the user interface support device drivers, API and graphics which all (70) outside the microkernel.

（68）处填（）。

A．include

B．includes

C．exclude

D．including
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