please call hot line____123456 for help if you have any problem.横线处填哪个介词

W________ you are in trouble,call this hot line to ake for help. TAY Hot-line是什么意思? a hot line Please wait a moment,Jane is on another line.英语句子Please wait a moment,Jane is on another line.Please give me a call at 2311-3822 When/If you call our support help line,please have your site name ready翻译 please call hot line____123456 for help if you have any problem.横线处填哪个介词 please call hot line____12345 if you have any problemsA.at B.on C.by 说明为什么! 线路图中的neutral line 和 hot line test line please link Please stand in line! Stand_____a line,please. Please wait a moment,Jane is on another line.英语句子Please wait a moment,Jane is on another line.Please give me a call at 2311-3822什么意思? machinery line 这句话的出处是：we need machinery line of elbow and fitting with hot forming process technology please offer me about that line,请问这个客户到底想买什么? Please call me color please call back 是什么意思 Please call me. Please call ( ) tomorrow Please call again later!