【简答题】Sally came to China last year. She is now living in Beijing and works in a computer company. She has been in the company for six months. The company is in the north of the city, and her flat is in the...
【简答题】(Você quer informações). Vou enviar __________ informações.
【单选题】She came in for ________ coffee and told me the noise of ________ traffic kept her awake last night. [ ]
【单选题】Once (giving) (a set of) instructions, a computer can gather (a wide ranger) of informa-tion (for different purposes).
D.
for different purposes
【单选题】某连续时间系统的输入x(t) 和输出y(t) 满足y(t)=|x(t)-x(t-1)| ,则该系统为