阿摩線上測驗
30 Firefighters often use an aerial _____ to reach high-rise buildings.
(A) drill
(B) hydrant
(C) ladder
(D) platform
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統計： A(19), B(12), C(60), D(22), E(0) #3461799
統計： A(19), B(12), C(60), D(22), E(0) #3461799
