观察下面示意图,造成1958—1960年我国农业生产总值变化的主要原因是( )
A:土地改革
B:人民公社化运动
C:对农业的社会主义改造
D:改革开放
Yesterday, I visited a middle school in Taiyuan. There are about students in it.
The painter was busy ____(调配,混合)his colours.