英文数学题Ben cycles to a city at average speed X and returns at average speed Y.His average speedfor the whole trip is ( )

英文数学题Ben cycles to a city at average speed X and returns at average speed Y.His average speedfor the whole trip is ( ) cycles to failure是什么意思 heres a cake for ben 还是to ben Ben英文如何读 Ben英文是什么意思 英文Ben是什么意思 英文人名Ben是什么意思 what does Ben do to plant a tree firstly Ben went to a party last Halloween.改为否定句 Ben is going to have a picnic tomorrow morning(改成否定句）Ben( )going to( ) a picnic tomorrow morning 求这句话的结构分析Heat pumps circulate a fluid refrigerant that cycles alternatively from its liquid phase to its vapor phase in a closed loop take to Ben Ben wants to drive. 选择一个英文词,填入括号里.（）1.When you go to Beijing,you will see_______ A.the Great Wall B.Big Ben C.Buckingham Palace 英文互译句子查找A problem hass ben detected and widows has been shut doun too prevent damage to your computer Ben plans to have a relaxing vacation.就have a relaxing vacation提问_____ _____ Ben plan _____ _____? ben and tim are talking to a polecewoman .改为一般疑问句 ____ ben and tim _____to a polecewoman Ben gave me a call ten minutes ago同义句Ben _____ _____ ______ _____ to me ten minutes ago