【单选题】由电阻 R =8 Ω 和感抗 X L =6 Ω 串联后,接到 220 V 的交流电源上,这时的电流和功率因数 cosφ 分别等于为
【单选题】对计算采样系统的稳态误差非常有用的Z变换基本定理是:
【单选题】Z变换的终值定理对计算采样系统的( )非常有用。
【简答题】十年前致明从学校走入社会,当时他和轻的朋友在一起,除了上班之外就是玩。工作是学校统一分配的,竞争也不激烈。尽管收入不高,但同事们都很高兴很快乐。那时的目标和期望就是从单位分到一套住房,可以不再住集体宿舍,不再吃集体食堂的饭了。后来致明有家了,有房子了。在过了一段舒适和安定的生活后,昔日的朋友一个个开始有了新的打算,有调离的,有出国的,还有继续上学深造的。致明也觉得自己的工作没有什么挑战,整天...
【单选题】The evening party _____. You are a little late. [ ]
【单选题】What do you think their mother has just done?
A.
She has gone to the grocer's
B.
She has just clone her shopping.
C.
She has bought a few jars.
D.
She has been in all day.
【单选题】He______the leader of the Model Group in our factory.
A.
has just been appointed
D.
has just being appointed
【单选题】下列各项中,关于“其他应交税费”科目说法正确的有( )。
B.
本科目核算单位按照税法等规定计算应缴纳的各种税费,包括车船税、房产税、印花税、企业所得税等
C.
本科目期末借方余额,反映单位多缴纳的税费金额;本科目期末货方余额,反映单位应缴未缴的税费金额
D.
本科目应当按照应缴纳的税费种类进行明细核算。属于增值税一般纳税人的单位,其应缴增值税明细账中应设置“进项税额”“已交税金”“销项税额”“进项税额转出”等专栏
【判断题】Petco has just purchased a sizable plot of land on which it will build a store building with a large parking lot. Across the street is a collection of specialty shops and a furniture store. Petco will...
【单选题】( )机构aqaqqa是槽轮机构的应用实例