【简答题】计算机病毒的传播媒介来分类,可分为单机病毒和网络病毒。()
【判断题】所谓晶体管输出特性曲线中的线性区域是指放大区
【单选题】When Mr. Smith met the doctor, he asked him if he once ______ .
A.
visited King High School
B.
studied in King High School
C.
taught in King High School
【判断题】硅整流电容储能直流电源,有电容储能,可以脱离交流电源供电,因此属于独立的操作电源。
【单选题】What is mentioned about fair trade?
A.
Its main function is to ensure authenticity.
B.
It is most prevalent among Mexican workers.
C.
It applies to nearly the entire inventory.
D.
It is judged by a single organization.