【单选题】(单选)Usenet命名规则第一部分确定专题小组所属的大类,约有( )顶级类别。
【单选题】I haven’t seen you for ages. How are you ______ with your English study?
【简答题】TTL具有开关速度较()、带负载能力较(),其体积()、可靠性()
【单选题】TMR2前分频为1,后分频为1,PR2=4则定时器模为多少?
【单选题】I haven’t seen you for so long. How have you been?
【单选题】—I haven’t seen you for ages. Where have you been? — I _______ on leave in Europe.
【单选题】听力原文:M: Where did you get that rare book? I haven’t seen you read it before. W: It was packed away until last week. It’s a family heirloom. Q: What do we learn about the rare book? (18)
A.
It has been in her family a long time.
B.
Her boyfriend gave it to her.
C.
The family doesn't like it.
D.
It is a family disgrace.