PLC consists of ， ， ， and some other .It’s very important for our testing system.
举一反三
- A computer system consists of hardware system and software system.
- Italked to the manager about changing our __1__ the other day. He said he’s very ___2___ in seeing some ______for a new logo.
- The ecological protection system is an important part of the farming system.
- 中国大学MOOC: Security vulnerability testing uses the simulation of attacks and other kinds of penetration testing __________ to compromise the security of a system.
- (multiple choices)Which of the following statements about our nervous system are correct? A: Our nervous system includes the central nervous system and the peripheral nervous system. B: The central nervous system only contains our brain. C: The somatic nervous system is part of the peripheral system. D: The autonomic nervous system can be divided into the sympathetic and the parasympathetic system.