试述影响动脉血压的因素。

●An operating system is (74) .

(74) A． the highest layer of software

B． the lowest layer of software

C． the highest layer of hardware

D． the lowest layer of hardware

【填空题】System software includes the （1） system and system （2）. Operating systems are （3） that manage the system resources and enable you to run （4） programs. System utilities are special programs that （5） the usefulness of or add capabilities to a computer. Operating system can be found on most （6）. It is a collection of program （7） that controls and manages the system’s hardware as well as （8） resources, thus enabling you to run application programs. Since the operating system serves as an （9） bridging the gap between hardware and application software, it makes your machine easier to use and ensures better performance of your （10） system as well.

An operating system is(74).

A．the highest layer of software

B．the lowest layer of software

C．the highest layer of hardware

D．the lowest layer of hardware

【填空题】Operating systems are normally （1） to their manufacturers and the （2） in which they are run. Generally, when a new computer （3） is installed, operational （4） suitable to that hardware is purchased. （5） want reliable operational software that can effectively support their （6） activities. Loading （7） is only one of the operating system’s many supporting （8）. It consists of software modules that insulate the（9） from the hardware, thus relieving the programmer of some very complex （10） of programming and making the system easier to use.

● The (72) is a collection of modules serving as interface between hardware and software to provide a software platform.

(72)

A. computer

B. processor

C. application software

D. operating system

● The (72) is a collection of modules serving as interface between hardware and software to provide a software platform.

(72)

A. computer

B. processor

C. application software

D. operating system

The early computer was not reliable mainly because of ______.

A．the poor software B．DOS, the disc operating system

C．the mechanical parts D．the hardware

A、Does your software integrate with the operating system？

B、Does your software contain the operating system？

C、Does your software integrate the operating system？