A:E(3s)>E(2s)>E(1s)
B:E(3s)>E(3p)>E(3d)
C:E(4f)>E(4s)>E(3d)
D:E(5s)>E(4s)>E(4f)
— Really? I can't wait to watch it.
—Look at ____skirt. I bought it for mother on Mother's Day, isn't it nice?
—Oh,what ____nice present!
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