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【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
C.
模块发出的超声波脉冲频率是40Hz
D.
Vcc端子接5v电源
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反馈参考答案：
举一反三
【简答题】简述幼儿中暑时教师应如何处理。
【单选题】After that, she is going to eat some _____. [ ]
A.
Chinese traditional food
B.
tradition Chinese food
C.
Chinese tradition food
D.
traditional Chinese food
【多选题】what does Chinese traditional culture involve?
A.
China’s Four Major Inventions
B.
four treasures of study:
C.
the four Great Classics in Chinese history
D.
Chinese traditional customs
【简答题】范宁著有 “王何论”,严厉批评______二人。
【简答题】After watching the micro-class video, please classify these Chinese traditional festivals and western traditional festivals. Chinese traditional festivals: Western traditional festivals:
【简答题】Chinese traditional painting
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