A:SO2气体通入BaCl2溶液中
B:SO2气体通入Ba(OH)2溶液中
C:SO2气体通入Ba(NO3)2溶液中
D:CO2气体通入饱和Na2CO3溶液中
下面说法正确的是( )
He usually goes to school ________ his bike, but sometimes he ________ a taxi to school.