8ASK,每个电平传输( )比特信息。 A: 4 B: 8 C: 2 D: 3
8ASK,每个电平传输( )比特信息。 A: 4 B: 8 C: 2 D: 3
Your task is to (8) ____________ and then ask questions.
Your task is to (8) ____________ and then ask questions.
8、在幅度键控(ASK)中载波频率随着调制信号而变化。
8、在幅度键控(ASK)中载波频率随着调制信号而变化。
Conversation 2 8（） A: To make an apology. B: To place an order. C: To ask about delivery. D: To cancel an appointment.
Conversation 2 8（） A: To make an apology. B: To place an order. C: To ask about delivery. D: To cancel an appointment.
Passengers ______ to fasten their belts. A: ask B: will ask C: to ask D: are asked
Passengers ______ to fasten their belts. A: ask B: will ask C: to ask D: are asked
I ______ a question. I did not ______ an answer. A: asked……ask for B: asked……ask C: asked for……ask for D: asked for……ask
I ______ a question. I did not ______ an answer. A: asked……ask for B: asked……ask C: asked for……ask for D: asked for……ask
The student is shy and he ______ questions in class. A: dares not ask B: does not dare to ask C: dares not to ask D: does not dare ask
The student is shy and he ______ questions in class. A: dares not ask B: does not dare to ask C: dares not to ask D: does not dare ask
6. Don't be afraid to______advice about things you are not good at. A: ask for B: ask to C: ask about D: ask out
6. Don't be afraid to______advice about things you are not good at. A: ask for B: ask to C: ask about D: ask out
If I were to see Tom, what ( )_ you me to tell him? A: are ,going to ask B: do , ask C: would , ask D: did, ask
If I were to see Tom, what ( )_ you me to tell him? A: are ,going to ask B: do , ask C: would , ask D: did, ask
If you have any problems, come to me and _____ help. A: ask about B: ask out C: ask for
If you have any problems, come to me and _____ help. A: ask about B: ask out C: ask for