The sensors used in the outdoor intelligent parking car detector are mainly ()?
Answer : C
If the data portion of the AT command that needs to be sent is 010203405, the length should be set to ()?
Answer : A
Among the following communication technologies, the frequency band is in the SubG license-free band ()? (Multiple choice)
Answer : C, D
Among the following options, what is not a feature of NB-loT technology is ()?
Answer : B
Among the options, what are the advantages of the JS framework ()? (Multiple choice)
Answer : A, C, D
Among the following options, what is not a key technical feature of NB-loT is ()?
Answer : D
In the following options, the terminal access method that is not commonly used in smart homes is ()?
Answer : C