A . -1000Hu
B . -500Hu
C . 0Hu
D . +500Hu
E . +1000Hu
[单选题]空气的CT值通常是()A.-1000HuB.-500HuC.0HuD.+500HuE.+1000Hu
[单选题]空气的CT值通常是()A.-1000HuB.-500HuC.0HuD.+500HuE.+1000Hu
[单选题]空气的CT值通常是()A.-1000HuB.-500HuC.0HuD.+500HuE.+1000Hu
[单选题]空气的CT值通常是()A.-1000HuB.-500HuC.0HuD.+500HuE.+1000Hu
[单选题]空气的CT值通常是()A.-1000HuB.-500HuC.0HuD.+500HuE.+1000Hu
[单选题]空气的CT值通常是()A.-1000HuB.-500HuC.0HuD.+500HuE.+1000Hu
[单选题]空气的CT值通常是()A.-1000HuB.-500HuC.0HuD.+500HuE.+1000Hu
[单选题]空气的CT值通常是A.-1000HuB.-500HuC.0HuD.+500HuE.+1000Hu