【单选题】
My friend_______when I came in.
【单选题】
8051单片机的并行I/O接口中,具有三态I/O能力的接口是。
【判断题】
在统一编址方式下,CPU访问I/O端口时必须使用专用的I/O指令
【单选题】
18.- Did you get a dictionary?- No, I _____, but there were not any _____.
【单选题】
I listened to journalists [填空]were excited about the changes.
【单选题】
I asked the secretary if there were ______ tickets but she had only the expensive ______.
【单选题】
In high school, I was very unpopular, and I did ( ) the discrimination from my classmates.
【单选题】
I haven’t finished my composition . I________ for two hours and a half.
【单选题】
I saw that she was in difficulty with all those parcels, so I offered my_____.
【单选题】
I haven’t finished my composition. I ___ for two hours and a half.