【判断题】“Pipe in mouth” in the sentence “The old man stood under a big tree, pipe in mouth” can also be in the form of “with a pipe in his mouth”.
【单选题】压电晶体式传感器通过内部的一个压电晶体来感应压力的变化,当压力变化时,作用在压电晶体上的 ( ) 使压电晶体输出一个信号电压。
【单选题】He stood on the deck, _______ pipe in mouth.
【简答题】Task Listen to the news report. At the end of news report, you will hear two or three questions. Both the news report and the questions will be spoken only once. Choose the best answer.
【单选题】压电晶体式传感器通过内部的一个压电晶体来感应压力的变化,当压力变化时,作用在压电晶体上的( )使压电晶体输出一个信号电压。