A.1次/2h B.1次/1h C.1次/4h D.1次/0.5h
A.4+5+2 B.4+5+1 C.5+5+4 D.4+5+5
A.1.130-1.134 B.1.125-1.130 C.1.135-1.139 D.1.140-1.145