储蓄存款年利率,月利率,日利率的互换关系是:()
A.年利率=月利率÷12
B.日利率=年利率÷360
C.月利率=年利率÷12
D.日利率=月利率÷30
参考答案:B, C, D
节日里安装彩灯,将22只彩灯串联,在接入正常家庭电路时,电源插头处的电流为200mA,则通过每只灯泡的电流为______A,每只灯泡两端的电压为______V.
Three hundred firemen raced to the hotel after a smoke detector________the alarm soon after midnight.[ ]
A. set off
B. set out
C. give away
D. give off