【单选题】Will you __ the light? It's dark in the room. I can't see clearly. [ ]
【单选题】有两台PID调节器R1和R2,其参数整定为PB1Ti2,Tdl>Td2,这表示______。
A.
R1的比例作用比R2强,R1的积分和微分作用比R2弱
B.
R1的比例作用比K2弱,R1的积分和微分作用比R2强
C.
R1的比例、微分作用比R2强,积分作用比R2弱
D.
R1的比例、微分作用比R2弱,积分作用比R2强
【单选题】Finally, save your document before you ________ your computer.
【单选题】We invited her to dinner but she didn’t even bother to _______.
【单选题】__________ the radio, please. I want to listen to the weather report. [ ]
【简答题】某电压表的电原理图如图2-所示,所用表头参数Ig50μA,rg=3kΩ,各挡量限如图2-所示,则分压电阻R1________,R2________。10V挡下的仪表内阻为________,50V挡下的仪表内阻为________。