A:2C8H18 + 25O2 = 16CO2 + 18H2O△H =-11036 kJ·mol-1
B:2C8H18(l) + 25O2(g) = 16CO2(g) + 18H2O(l)△H =-11036 kJ·mol-1
C:2C8H18(l) + 25O2(g) = 16CO2(g) + 18H2O(g)△H =-11036 kJ·mol-1
D:2C8H18(l) + 25O2(g) = 16CO2(g))+18H2O(l)△H =-5518kJ·mol-1
汶川地震后我国无人驾驶飞机迅速对该地灾情进行监测,主要运用了( )
如图所示,在探究“怎样产生感应电流”的实验中,蹄形磁体水平放置,闭合开关,要使灵敏电流计的指针发生偏转,导体ab应( )