68.閃爍攝影機的定位最主要是利用下列那個裝置?
(A)collimator
(B)positioning circuit
(C)photomultiplier tubes
(D)pulse height analyzer
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統計: A(149), B(568), C(172), D(127), E(0) #3283028
統計: A(149), B(568), C(172), D(127), E(0) #3283028