15 下列何者是用來縮短直線加速器加速管長度的空腔設計?
(A)共振空腔(resonant cavity)
(B)耦合空腔(coupling cavity)
(C)集束空腔(bunching cavity)
(D)加速空腔(accelerating cavity)

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統計: A(6), B(35), C(5), D(17), E(0) #2261578