Based on Section A, Part 2, Unit 2, fill in each of the blanks with one of the words given below.(详见Section A, Part 2, Unit 2课后练习第1题) The function of computer hardware is typically divided into three main categories. They are 1_______, 2________ and 3_______. The software that controls the interaction between the input and output hardware is called BIOS, which stands for 4___________. The two most common types of scanners are 5_______ and 6_______. Video displays commonly take one of two forms. They are CRT-based screens and 7_______ screens. In the text, the author mentions three of the most commonly used types of printer. They are 8______, laser printers and 9_______. According to the text, the two main types of storage devices are 10_______ and 11_______. It can be said that having a steady power source is important for a computer because RAM is 12_______ memory. A(n) 13________ connection transfers only one piece of data at a time while a(n) 14_______ connection transfers blocks of information at the same time. flatbed hand-held input output storage serial dot-matrix volatile Basic Input/Output System LCD-based disk memory parallel inkjet