A . 1/2
B .1/4
C .1/8
D .1/16
[单选题,A1型题] 已知一核素半衰期为2天,剂量为8mCi,请问8天后为A .2mCiB .0.5mCiC .1mCiD .0mCiE .1.5mCi
[单选题]已知一核素半衰期为2天,剂量为8mCi,请问8天后为()。A . 2mCiB . 0.5mCiC . 1mCiD . 0mCiE . 1.5mCi
[单选题]已知一核素半衰期为2天,剂量为8mCi,请问8天后为A.2mCiB.0.5mCiC.1mCiD.0mCiE.1.5mCi
[单选题]已知一核素半衰期为2天,剂量为8mCi,请问8天后为A.2mCiB.0.5mCiC.1mCiD.0mCiE.1.5mCi
[单选题]已知一核素半衰期为2天,剂量为8mCi,请问8天后为A.2mCiB.0.5mCiC.1mCiD.0mCiE.1.5mCi
[单选题]已知一核素半衰期为2天,剂量为8mCi,请问8天后为A.2mCiB.0.5mCiC.1mCiD.0mCiE.1.5mCi
[单选题]已知一核素半衰期为2天,剂量为8mCi,请问8天后为A.2mCiB.0.5mCiC.1mCiD.0mCiE.1.5mCi
[单选题]已知一核素半衰期为2天,剂量为8mCi,请问8天后为()A . 2mCiB . 0.5mCiC . 1mCiD . 0mCiE . 1.5mCi
已知一核素半衰期为2天,剂量为8mCi,请问8天后为:A. 2mCiB. 0.5mCiC. 1mCiD. 0mCi
[单选题]已知一核素半衰期为2天,剂量为8mCi,请问8天后为A.2mCiB.0.5mCiC.1mCiD.0mCiE.1.5mCi