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(199), C(656), D(32), E(0) #3126431

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#6033922
下列哪種裝置是用於提供大量相對低壓的空氣...
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