单项选择题
A.<0.1s B.<0.5s C.<1s D.<1.5s E.<2s
A.≤±0.1% B.≤±0.2% C.≤±0.5% D.≤±1% E.≤±2%
A.±0.1% B.±0.2% C.±0.5% D.±1% E.±2%
A.MRI B.B超 C.DSA D.SPET E.EPID
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