A.2~6℃ B.20~24℃ C.8~12℃ D.12~18℃ E.6~8℃
A.20次/分,1cm B.30次/分,2cm C.40次/分,3cm D.50次/分,4cm E.60次/分,5cm
A.2~6℃ B.6~8℃ C.8~12℃ D.12~20℃ E.20~24℃