A:4个
B:3个
C:2个
D:1个
一般违法行为和犯罪行为的共同点是 ()
They issued two special sets of stamps on Jan 8, 2013, __________ the Chinese Lunar Year of the Snake. ( )
①电压表量程为15 V
②电压表量程为3 V
③滑动变阻器为(20 Ω,3 A)
④滑动变阻器为(500 Ω,3 A)