— ________ The hosts know how to host a party.
A:Don't worry
B:Yes, indeed
C:No, there's isn't
D:It all depends
电阻为12Ω的电铃,正常工作时的电压为6V,现只有一个8V的电源,要使它正常工作,要给它____联一个____Ω的电阻.