约束性固定成本和酌量性固定成本的差异在于（）
A、与性态量的关系B
暂无解析
They’dlike____thankthefollowingpeople_____theirhelpandsupport.
Onnoaccount____everleavethebabyathomealone.
Theoldmanshouldbetreatedwith____.
EinsteinwontheNobelPrizein1921andenjoyedgreatfameinGermanyuntiltheriseofNazism____hewasexpelledfromGermanybecausehewasaJew.
You____thatlettertoJames.However，youdidn't.
