A.15s,30s, 30s B.15s,30s, 20s C.15s,30s, 15s D.30s,45s, 15s
A.4%~6% B.3%~6% C.2%~5% D.3%~8%
A.3s,1min B.5s,1min C.3s,2min D.5s,2min