A:was taken; cut
B:taken; cut
C:taking; cuts
D:to take; cutting
____
—I see. And I will try my best to_________ smoking.
通过电阻R的电流强度为I时,在t时间内产生的热量为Q,若电阻为2R,电流强度为 I2 ,则在时间t内产生的热量为( )