标签分几种类型（）
A: AM/PM/PD
B: SAF/AM/PM
C: SAF/AM/PD
D: SAF/PM/PD
A: AM/PM/PD
B: SAF/AM/PM
C: SAF/AM/PD
D: SAF/PM/PD
举一反三
- 标签分为哪三类标签？（） A: 蓝色标签为AM，红色标签为PM，绿色标签为SAF B: 黄色标签为AM，红色标签为PM，绿色标签为SAF C: 蓝色标签为PM，红色标签为AM，绿色标签为SAF D: 蓝色标签为AM，黄色标签为PM，绿色标签为SAF
- 连续波调制的方法有调幅、调频和调相，其对应的简写字母依次是（ ） A: AM、PM、FM B: PM、AM、FM C: AM、FM、PM D: FM、AM、PM
- Interview One The peak for text messaging is between ______. A: 10:30 pm and 11:00 pm B: 7:30 am and 8:00 am C: 10:30 am and 11:00 am D: 8:00 pm and 10:30 pm
- When does the store open A: 8:30 am B: 9 am C: 5 pm D: 4:30 pm
- The analog and digital modulation types include ( ). A: PM, FSK, ASK, PSK, Sine B: Square, AM, FM, PM C: FSK, ASK, PSK, DC D: AM, FM, PM, FSK, ASK, PSK, DSB-AM