--Smoking is bad for your health.
--You're right.I have decided to .
A:turn it down
B:find it out
C:turn it off
D:give it up
下列关于滨州市的叙述,正确的是( )
如图所示,电源电压恒为12V,电阻R1为20Ω,当开关S闭合后,电压表的示数为8V,求:
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