【简答题】(p1wu?北京)在△ABC中,a=u,b=p 6 ,∠B=p∠A. (Ⅰ)求cosA的值; (Ⅱ)求c的值.
【判断题】在买方市场上,消费者和用户主宰市场,企业必须重视他们的意见。
【多选题】证券交易服务是指为客户在软件和硬件上提供服务,包括()。
【单选题】---What made you so_________? ---Oh, Mr Wu told us a funny story and it made us _________.
【单选题】Mrs. Wu told me that her sister___________.
A.
left about two hours before
B.
would leave about two hours before
C.
has left about two hours ago
D.
had left about two hours before
【单选题】Professor Wu told us that by the end of the year he______here for three years.
B.
will have been working
C.
would have been working