NAVTEX中，一个字符传送时间是70MS，则传送的速率是（）.
A.50Bd
B.100Bd
C.32Bd
D.400Bd
参考答案：B
抗菌肽的研究展望。
Can I help you, sir?（）
A.No, I don't need your help.
B.Yes. I'd like to withdraw some money
C.Well, leave me alone.
D.Don't bother me!
