有效积温则公式中， TO 为（）
B
暂无解析
TheToriesweretheforerunnersof________,whichstillbearsthisnicknametoday
Whathetolduswasmoreofa(n)________thanareality.
Theprofessorworkedfor7hoursata________.
Britainhas,forcenturies,beenslowlytiltingwith________.
ThelongestriverinCanadais________.
