【单选题】You are building a client for a Windows Communication Foundation (WCF) service. You need to create a proxy to consume this service. Which class should you use?()
【单选题】Windows Communication Foundation (WCF) service will be hosted in Microsoft Internet Information Services (IIS).You create a new application in IIS to host this service and copy the service DLL to the ...
A.
Create an asmx file and add a @ServiceHost directive to this file. Copy the file to the root of the application directory.
B.
Create an .asmx file and add a @Register directive to this file. Copy the file to the bin directoyy of the application.
C.
Create a svc file and add a @ServiceHost directive to this file. Copy the file to the root of the application directory.
D.
Create a .svc file and add a @Register directive to this file. Copy the file to the bin directory of the application.
【单选题】This service should be available________ everybody, regardless of whether they can afford it.
【简答题】今分析某硅酸盐样品,称取试样 0.5000g ,采用适当方法完全溶解后将所含的 Fe 3+ 还原为 Fe 2+ ,用 KMnO 4 标准溶液滴定,消耗 KMnO 4 溶液 25.00ml ,再称取试样 0.5000g ,用重量法分析,得到 Fe 2 O 3 和 Al 2 O 3 总质量为 0.4500g 。已知 1ml 的 KMnO 4 溶液相当于 0.006301g 的 H 2 C 2 O 4 ...
【简答题】某车间体积V f =1000m 3 ,由于突然发生事故,某种污染物大量散入车间,散发量为350mg/s,事故发生后10min被发现,立即开动事故风机,事故排风量为L=3.6m 3 /s,试问:风机启动后要经过多少分钟,室内污染物浓度才能降到100mg/m 3 以下(风机启动后污染物继续发散)。 (要求小数点后保留2位小数,可以照片方式附上计算过程)
【简答题】准确称取软锰矿试样 0.5000 g ,在酸性介质中加入 0.7500 g H 2 C 2 O 4 ·2H 2 O 及稀 H 2 SO 4 ,加热 至反应完全。过量的草酸用 30.00 mL 0.02000 mol·L -1 KMnO 4 滴定至终点,求 MnO 2 在软锰矿 试样中的质量分数。 (已知:H 2 C 2 O 4 ·2H 2 O 相对分子质量为126.07, MnO 2 相对分子质量...
【单选题】当条件具备时,结果不会发生;而条件不具备时,结果一定会发生,这指的是( )逻辑。
【单选题】称取铁矿石0.5000g,用酸溶解后加SnCl2,Fe3+将还原为Fe2+,然后用24.50mL KMnO4标准溶液滴定。已知1mL KMnO4相当于0.01260g H2C2O4?2H2O,问矿样中Fe的质量分数为(H2C2O4?2H2O :126.07,Fe:55.85)
【单选题】当条件具备时,结果不会发生;而条件不具备时,结果一定会发生,这是对( )逻辑的描述。
【单选题】当条件具备时,结果不会发生;而条件不具备时,结果一定会发生,这是对( )逻辑的描述。