【简答题】用IUPAC及普通命名法(如果可能的话)命名或写出结构式。
【单选题】在采用变频调速时可以控制频率超过额定频率运行,但是由于供电电压限制,超频后的电压不能上升,超频后下列( )正确。
【简答题】用下词语填空: whenever whoever whatever However We decide to finish the work on time, ____ happens.
【多选题】变压变频调速在基频以下调速时,不变的量是( )。
【判断题】不确定性很高时.采用方向性计划而不是具体计划效果更好。
【简答题】用 IUPAC 及普通命名法 ( 如果可能的话 ) 命名或写出结构式
【简答题】用下词语填空: whenever whoever whatever However He would have a look at the bookstores ____ he went to town.
【简答题】用下词语填空: whenever whoever whatever However I ’ ll give the book to ____ likes English. whoever
【单选题】The star performer of comic dialogue is full of humor, who is able to ______an occasion whenever _____ go wrong with his humorous performances [ ]
【简答题】用下词语填空: whenever whoever whatever However If we work with a strong will, we overcome any difficulty, ____ great it is. However