basically“less than”,“greater than'”,and“equal to”,can be combined into several common expressions,such as "greater than or equal to".The objective of most instructions that use comparisons is to determine which instruction should be executed next. ()Tell whether the following statements are true(T)or false(F)according to the passage A.(根据上文的内容判断下列句子的正误。15分，每题3分) 1.With the development of computer,the physical size of the CPU has often become bigger and bigger. () 2.The movement of electronic signals between main memory and the ALU as well as the control signal between the CPU and input /output devices are controlled by the control unit of the CPU. () 3.The CPU comprises the control unit and memory. () 4.The control unit performs all the arithmetic and logical (comparison)functions. 5.The central processing unit (CPU)is the heart of the computer systems. ( ) Passage B A computer system can roughly be divided into three components: The hardware (memory,CPU,arithmetic-logic unit,various bulk storage,I/O, peripheral devices…) System software (operating system,compilers,editors,loaders,utilities...) Application software (database systems,business programs...) A computer system can be described or shown in the following Figure. 园丝 Ur通 Datpbase Application System moerans Search Pograms Mol CoigabI Editor Loader Applimtin and Uiltis Systers Operating system Programs Corputer Handware Fig.1 Conceptual view of a computer system 1421basically "less than"，"greater than"，and "equal to"，can be combined into several common expressions, such as "greater than or equal to". The objective of most instructions that use comparisons is to determine which instruction should be executed next. (二)Tell whether the following statements are true(T) or false(F) according to the passage A.(根据上文的内容判断下列句子的正误。15分，每题 3分) 1. With the development of computer, the physical size of the CPU has often become bigger and bigger. ( ) 2. The movement of electronic signals between main memory and the ALU as well as the control signal between the CPU and input /output devices are controlled by the control unit of the CPU. ( ) 3. The CPU comprises the control unit and memory. ( ) 4. The control unit performs all the arithmetic and logical (comparison) functions. ( ) 5. The central processing unit (CPU) is the heart of the computer systems. ( ) Passage l3 Acomputer system can roughly be divided into three components: ·The hardware(memory, CPU, arithmetic-logic unit, various bulk storage, 1/O, peripheral devices...) ·System software (operating system, compilers, editors, loaders, utilities. ..) ·Application software (database systems, business programs.，.) Acomputer system can be described or shown in the following Figure. 登宅漱 泊 薪耀刹一} ” P}D ， grarcn ， s C 山 E itor 下4,.77&7 Applka2im怕尸dTt,lhes 伽erating system S ysterty rmgrarns Cort7FuterHaxiware Fig. 1 Conceptual view of a computer system 1421