A:侏儒症
B:呆小症
C:佝偻病
D:糖尿病
小梅同学设计了如图所示的汽车有害尾气排放检测电路.其中,R为气敏电阻,它的阻值随有害气体浓度的增大而变小,电源电压恒定不变,R0为定值电阻,闭合开关,当有害尾气浓度增大时( )
In order to lose weight, the young lady prefers to ______ regularly rather than take expensive weight-losing pills.