克林霉素制成其磷酸酯修饰的目的是
C
暂无解析
WepreferChinesebicycles __Japanesebicycles ___theirfinequality.
Itisnotdecided________theconferencewillbeheld.
Countrylifeisbetterthancitylife________itoffersfreshairandnoiselessenvironment
―________finedayitistoday!
Thistypeofdeskandchaircanbeadjusted________theheightofstudentsatdifferentages