Составить аннотацию на для текста : central processing unit it is well-known in computer science that the words “computer” and “processor” are used interchangeably. speaking more precisely, “computer” refers to the central processing unit (cpu) together with an internal memory.the internal memory, control and processing components make up the heart of the computer system. manufactures design the cpu to control and carry out basic instructions for their particular computer. the cpu coordinates all the activities of the various components of the computer. it determines which operations should be carried out and in what order. the cpu controls the operation of the entire system by issuing commands to other parts of the system and by acting on responses. when required, it reads information from the memory, interprets instructions, per- forms operations on the data according to the instructions, writes the results back into the memory, and moves information between memory levels or through the input-output ports. in digital computers the cpu can be divided into two functional units called the control unit (cu) and the arithmetic-logic unit (alu). these two units are made up of electronic circuits with millions of switches that can be in one of two states, either on or off. the function of the cu within the central processor is to transmit coordi- nating control signals and commands. the control unit is that part of the com- puter that directs the sequence of step-by-step operations of the system, selects instructions and data from memory, interprets the program instructions, and controls the flow between main storage and the arithmetic-logic unit. the alu, on the other hand, is that part of the computer in which the actual arithmetic operations, namely, addition, subtraction, multiplication, division, and exponentiation, called for in the instructions are performed. programs and the data on which the cu and the alu operate, must be in internal memory in order to be processed. thus, if located in secondary memory devices, such as disks or tapes, programs and data are first loaded into internal memory.
7. We shall have decorated the Christmas tree before our children come back.
11. I shall have been teaching for ten years this year.
13. I am going to finish my second book by the end of this year. (publish)
15. My second book will have been published by the end of this year.
19. Before Greg calls me, I shall have been considering his proposal all the time.
23. You will be sweating until you open the window.
27. By Friday we shall have received all the needed information.
31. This year the trees will have been growing for three years.
2. You spend money when you use it to pay for something.
3. If you can't afford something, it is too expensive for you.
4. You earn money from work that you do.
5. You save money by keeping it instead of spending it.
6. If you lend money to someone, you give it to them for a short time: later they must pay it back.
7. You borrow money when someone gives it to you for a short time.
8. When you borrow money from someone, you owe it to them until you give it back.