Is that a cherry? Yes, it is. No, it isn't.
如图,在Rt△ABC中,∠C=90°,AB=2BC,则sinB的值为( )
hú dié
jiāo nèn
sàn bù
xiōnɡ pú
kǎo chá
____
mò fánɡ
shì yàn
zī rùn
wēi wǔ
xīn shǎng
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.