在下列逻辑电路中，是组合逻辑电路的有___________。
A. 具有记忆功能的寄存器
B. 译码器
C. 编码器
D. 七段显示译码器
– ( )– There was a volcano eruption in Japan.
A. What’s the news?
B. Did you know the eruption?
C. Is there anything wrong?
D. Oh, did you hear that?
– Did you hear what happened to John?– ( )
A. Who is John?
B. John is a good man.
C. No, I have no idea. What?
D. John happened to be here.
– Bill had a car accident and broke his arm.– ( )
A. It’s impossible.
B. Really? How terrible?
C. It’s too good to be true!
Don’t cry!
微信支付 
支付宝支付