单项选择题

A.上中下部检测值:氢分别为:0.6%,0.5%,0.3%,氧分别为:18.5%,20.5%,21.0%
B.上中下部检测值:氢分别为:0.5%,0.4%,0.3%,氧分别为:24.5%,21.5%,23.5%
C.上中下部检测值:氢分别为:0.5%,0.4%,0.3%,氧分别为:19.5%,20.5%,20.5%
D.上中下部检测值:氢分别为:0.7%,0.4%,0.3%,氧分别为:24.5%,22.5%,23.5%