单项选择题
A.直接损伤B.波及损伤C.诱发损伤D.惯性损伤
A.≤0.6sB.≤0.7sC.≤0.8sD.≤0.9s
A.10-20%B.20-30%C.30-40%D.40-50%
A.0.90~0.92B.0.90C.0.85D.0.80
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