阿摩線上測驗
30. Which device is used to provide the relatively large quantities of low-pressure air.
(A) fan
(B) compressor
(C) blower
(D) ejector
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統計： A(78), B(201), C(691), D(34), E(0) #3126431
統計： A(78), B(201), C(691), D(34), E(0) #3126431
