【单选题】阈值是对所探测的火灾参数设定固定值,发生火情后,该参数( ),一旦达到阈值便发出一个阶跃开关量信号,并由此驱动报警系统。
【单选题】操作罐法时,一般施术者站于被操作者的那个位置?
【单选题】阈值是对所探测的火灾参数设定固定值,发生火情后,该参数逐渐__,一旦达到阈值便发出一个阶跃开关量信号,并由此驱动报警系统。
【单选题】A Windows Communication Foundation (WCF) service is deployed with netTcpBinding. This service uses a duplex message exchange pattern.You are developing the next version of the WCF service. You discove...
B.
Create a custom binding that has the compositeDuplex, textMessageEncoding, and namedPipeTransport binding elements in this order.
C.
Create a custom binding that has the compositeDuplex, textMessageEncoding, and wsHttpTransport binding elements in this order.
【简答题】用高锰酸钾法测定锰矿石中的锰含量。称取均匀锰矿石样品0.5000g,加入0.8500g纯H 2 C 2 O 4 ˙2H 2 O,并加入足量的稀硫酸,加热反应完全后,用浓度为c(1/5KMnO 4 )=0.1000mol/L的高锰酸钾标准滴定溶液回滴剩余的草酸,消耗5.00ml,锰矿石中的MnO 2 的质量分数为()。
【单选题】Your company has a domain controller named Server1 that runs Windows Server 2008 R2 and the DNS Server server role. A server named Server2 runs a custom application.You need to configure DNS to includ...
B.
Service Location (SRV)
C.
Canonical Name (CNAME)
D.
Well-Known Service (WKS)
【简答题】称取含铝试样0.5000g,溶解后用8-羟基喹啉沉淀,得到0.3200gAl(C 9 H 6 NO) 3 沉淀。计算试样中铝的质量分数。沉淀形式若为Al 2 O 3 ,可得到多少克Al 2 O 3 沉淀物?[M(Al)=26.98g·mol -1 ,M(AlC 27 H 18 N 3 O 3 )=459.44g·mol -1 ,们(Al 2 O 3 )=101.96g·mol -1 ]
【单选题】They should do ________ about this terrible train service.