Production department 2 A: Machine hours B: Labour hours

The minimum interrupt response time of 89C51 is ( ) machine cycles and the maximum is ( ) machine cycles. A: 1 5 B: 2 6 C: 3 6 D: 3 8

The NC machine tool system contains the machine control unit (MCU) and the （ ） A: Machine B: Machine tool C: NC

There are five basic types of machine tools such as lathe or turning machine, drilling or boring machine, milling machine, shaper or planer, and grinder.

The NC machine tool system contains the machine control unit ________ and the machine tool itself.

They position the metal stock on the machine tool—___________，___________，___________, or other type of machine A: drill press B: lathe C: milling machine D: turning machine

The factory has produced a new kind of ____. A: machine B: machines C: a machine D: the machine

ATM is the abbreviation of _______. A: Automatic Transaction Machine B: Automatic Translation Machine C: Automatic Teller Machine

Equipment for washing A: low consistence washing machine B: medium consistence washing machine C: high consistence washing machine D: Diffusion washing machine

The<br/>necessary condition for A compiler on machine a to be used directly<br/>on machine B is that the operating system functions of machine a and<br/>machine B are identical.() A: True B: False