【简答题】根据句意填单词,首字母已给出。 1. We should brush our t_________ every day. 2. If you have a toothache, you must go to see a d_________. 3. I'm very t_________, I want to drink some water. 4. I have an i_________ me...
【单选题】关于SR04超声测距模块,说法错误的是( )
A.
必须给Trig端子10us的高电平信号,以触发模块测距功能
B.
触发测距功能后,模块会自动发送8个40kHz的超声脉冲
【简答题】选择合适的词组,并用其的正确形式填空 make sure how about main course famous for a great treat deal with 1. What would you like for the __________? 2. Where shall we go? __________ the Chinese r...
【单选题】关于SR04超声测距模块,说法错误的是( )
A.
必须给Trig端子10us的高电平信号,以触发模块测距功能
B.
触发测距功能后,模块会自动发送8个40Hz的超声脉冲
【简答题】所谓支路电流法就是以支路电流为未知量,依据列出(__)方程式,然后解联立方程得到数值。
【判断题】所谓支路电流法就是以支路电流为未知量,依据基尔霍夫第二定律列出方程式,然后解联立方程得到各支路电流的数值。
【简答题】根据句意填单词,首字母已给出。 1. We should brush our t______ every day. 2. If you have a toothache, you must go to see a d______. 3. I'm very t______, I want to drink some water . 4. I have an i______ meeting. I mu...
【简答题】. 所谓支路电流法就是以(支路电流)为未知量,依据 列出方程式,然后解联立方程地得到 的数值。
【简答题】I . 根据句意,从方框中选择恰当的词语填空,有的需要变换形式。 lonely, notice, sign, care for, volunteer, put off 1. Peter is a great boy. He always ________ to look after old people. 2. Jenny lives alone in Shanghai. She must b...
【单选题】关于SR04超声测距模块,说法错误的是( )
A.
必须给Trig端子10us的高电平信号,以触发模块测距功能
B.
触发测距功能后,模块会自动发送1个40kHz的超声脉冲