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问题 单项选择题

男性，40岁，因肠梗阻入院。查体：血钠140mmol/L，血氯70mmol/L，血钾2.6mmol/L，血pH值为7.55，该病人患有（）.

A.低钾血症

B.低钠血症

C.低氯血症

D.低氯、低钾血症

E.低氯、低钾血症，碱中毒

答案

参考答案：E

选择题

下面关于匀速直线运动的速度说法中正确的是

A．物体运动路程越长，速度越大

B．物体运动时间越短，速度越大

C．速度是表示物体运动快慢的物理量

D．速度的大小与路程的长短、时间的多少有关
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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.

（70）处填（）。

A．live

B．dwell

C．occupy

D．reside
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