问题：
[单选题]Computer systems consist of two very different types of elements:(71 ) , which includes all the physical things that can be touched and Software, which tells the hardware how to do.
A、Operating system
B、I/O devices
C、Courseware
D、Hardware
参考答案：
D
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- ● Computer ytem conit of two very different type of element：Hardware，which include all the phyical thing that can be touched and（），which tell thehardware how to do.
- ● Computer ytem conit of two very different type of element:(71 ) , which include all the phyical thing that can be touched and Software, which tell the hardware how to do.
- ● Computer ytem conit of two very different type of element: Hardware, which include all the phyical thing that can be touched and(71)which tell the hardware how to do.
- ● ● Baically, a computer conit of five component: (71)， memory, torage, input device and output device.(71)
- ● ●The mot important core component of computer ytem i _(71) ．(71)
- ● ●The mot important core component of computer ytem i (71) ．(71)
- ● Conventionally,a computer conit of at1.at one proceing element, typically a(73) and ome form of memory.
- ● A(72)conit of the ymbol, character, and uage rule that permit people to communicate with computer.
- ● A(72)conit of the ymbol, character, and uage role that permit people to communicate with computer.
- ● Cot of pipeline i very different of underground condition. I it right? （）
- ● ●The typical firewall conit of two packet filter and a (an) (68) ．
