由900Hz信号得到150Hz和90Hz信号分别需要进行()。
A.6分频,10分频
B.10分频,6分频
C.6倍频,10倍频
D.10倍频,6倍频
参考答案:A
根据对话内容,补全对话。每空一词。
A: What are you going to do next Saturday?
B: I (1)_________ no idea. What about you?
A: We (2)_________ (3)_________ to play basketball with our teachers.
Would you like to come?
B: Yes, I (4)_________ love to. (5)_________ are you going to begin?
A: At 8 o’clock.
B: Oh, I’m (6)_________. I can’t come so (7)_________. I must finish my
homework first.
A: Sure. Study must come first. You may come (8)_________ (9)_________
later. But don’t(10)_________ too late.
B: All right. I’ll be there at 8:30.
乘坐公司班车进入候工区和现场,人员排队上下班车严禁由()绕行。
A、车头
B、车尾
C、都行