

1、单选题:
Which is the analog signal?
选项:
A: ![]()
B: ![]()
C:
D:
答案: 【 ![]()
】
1、单选题:
Which is the digita signal?
选项:
A: ![]()
B: ![]()
C:
D:
答案: 【
】
1、判断题:
Bluetooth technology is free for all the people
选项:
A: 正确
B: 错误
答案: 【 正确】
1、单选题:
Where can we use WLAN except ( )
选项:
A: in hospital
B: in restaurant
C: in house
D: in tunnel
答案: 【 in tunnel】
1、单选题:
Which is the multimeter ? ( )
选项:
A: ![]()
B: ![]()
C: ![]()
D:
答案: 【
】
1、单选题:
Which is the oscilloscope ? ( )
选项:
A: ![]()
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