【简答题】在如图T1所示电路中,已知V CC =12V,晶体管的b=100, =100kΩ。填空:要求先填文字表达式后填得数。 (1)当 =0V时,测得U BEQ =0.7V,若要基极电流I BQ =20μA, 则 和R W 之和R b =____≈____kΩ;而若测得U CEQ =6V,则R c =____≈____kΩ。 (2)若测得输入电压有效值 =5mV时,输出电压有效值 =0.6V, 则电压放大...
【单选题】Transportation in the U.S. Railroads are paths of parallel metal rails that allow a wheeled vehicle to move more easily by reducing friction. Iron mils were first used in the early 1800s to guide hors...
【简答题】A. cycled B. drove C. wheeled D. fled
【简答题】如图所示,若已知变压器二次电压有效值 U2=20V,现测得UL为下述四组数据:(1)9V;(2)18V;(3)24V;(4)28V。问哪一组数据是正常的?对不正常的测量数据,试分析电路可能出现了什么故障(元器件的开路或短路)?
【多选题】申请个人汽车贷款,借款人须提供一定的担保措施,包括()。
【单选题】申请个人汽车贷款,借款人须提供一定的担保措施,不包括( )。
【多选题】申请个人汽车贷款,借款人须提供一定的担保措施,包括( )
【单选题】Metal-wheeled chariots are the_________of the tanks of modern warfare.