【单选题】What does the telegram say?
A.
Return immediately for his parents missed him badly.
B.
Return immediately for his aunt is expecting him.
C.
Return immediately for something unusual happened at home.
D.
Return immediately for his uncle was seriously ill at home.
【简答题】return o O是代表什么呢?如果不返回O 会怎么样?friend ostream& operator$amp for(int i=0 i o $amp } return o }
【单选题】What does the librarian imply when she tells the man to return at nine o'clock?
A.
She will see the man after work.
B.
The library probably closes at eleven.
C.
She is too busy to help the man now.
D.
Her supervisor will be there at that time.
【简答题】部分进汽损失只在部分进汽度 e 1 的级中存在, 全周进汽的级, e 1 。 部分进汽损失由 和 两部分组成,其中 发生在不装喷嘴的弧段上, 发生在装有喷嘴的进汽弧段内。 减少隔板漏汽损失的方法是:在隔板与转轴处加装 、在动叶根部处设置 、在叶轮上开 。 减少叶顶漏汽损失的方法是:在动叶顶部加装 ;减少扭叶片顶部的 。 级的相对内效率是指级的 与级的 之比。 考虑级内的各项损失后,同一级的相对内效...
【单选题】Based on the scenarios below, what is the expected return for a portfolio with the following return profile?______.
【多选题】变频空调; 在常规空调的结构上增加了一个变频器。变频器是用来控制和调整压缩机转速的控制系统,使之始终处于最佳的转速状态,从而提高能效比(比常规空调节能 20%-30% ).它的特点是: 1.制冷制热的速度比常规空调快
【简答题】点的速度按规律v=v 0 +at变化.这个点在时间区间[0,T]经过多少路程?