一个同步帧的时间为 ( )
A: 125us
B: 250us
C: 375us
D: 500us
A: 125us
B: 250us
C: 375us
D: 500us
B
举一反三
- 一个同步帧的时间为（）。 A: 125μs B: 250μs C: 375μs D: 500μs
- Are there enough books for ____? A: three us B: us three C: all us D: the three us
- ______ agrees to your plan. A: Anyone of us B: No one of us C: None of us D: Someone of us
- Mr. Yang ______. A: teaches math us B: teaches us to math C: teaches math to us D: us teaches math
- 一个复帧是由（）个C-12基帧构成，一个复帧的周期为（）。 A: 8、500us B: 8、125us C: 4、125s D: 4、500us
内容
- 0
Miss Li is ______ English teacher. She likes______ very much. A: our, we B: our, us C: us, our D: us, us
- 1
The new washing-machine has been______. A: giving us trouble B: getting us trouble C: asking us trouble D: looking for us trouble
- 2
What does sleeping help us? A: It helps us stay healthy. B: It helps us improve our memory. C: It helps us reduce stress. D: It helps us lose weight.
- 3
Any delay in the shipment would ______. A: cause us in inconvenience B: involve us in much inconvenience C: involves us in convenience D: involve us inconvenience
- 4
The covering L/C must be confirmedby _____. A: the bank to accept us B: B.a bank acceptable to us C: the bank acceptable for us D: a bank acceptable by us