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单选题
Indicating system refers to that portion of the system which is used to indicate temperature and pressure of the pneumatic system. Includes temperature and pressure warning systems.
A
Indicating system can shadow temperature and pressure of the pneumatic system, with the assistance of temperature and pressure warning systems.
B
People use indicating system to forecast temperature and pressure of the pneumatic system, which includes temperature and pressure warning systems.
C
Indicating system can give us information about temperature and pressure of the pneumatic system and it covers temperature and pressure warning systems.
答案解析
正确答案：C
