【简答题】Listen to the recording of Task D and supply the missing words.
【简答题】listen to the recording and then supply the missing words in the passage below.
【判断题】带续流二极管的三相零式整流电路,续流二极管的作用是提高电路输出电压。
【单选题】在医院感染中,由条件致病菌引起的感染多为
【多选题】日常生活中尽量避免交错沟通,最好是互补沟通,互补沟通的意义表现在( )。
【简答题】Listen to the passage and supply the missing words or phrases. Audio Player
【简答题】Listen to the passage three times and supply the missing information.