A.1個(gè)HVL B.2個(gè)HVL C.4個(gè)HVL D.5個(gè)HVL E.6個(gè)半HVL
A.80% B.85% C.90% D.95% E.100%
A.±0.1cGy B.±0.5cGy C.±1cGy D.±2cGy E.±5cGy