To buy some salt, the careless housewife went downstairs,________the fish________over the gas.
A:left;cooked
B:leaving;being cooked
C:leaving;cooking
D:left;being cooked
下列统计图中,可以直观地反映出数据变化的趋势的统计图是( )
①abc<0;②2a+b=0;③a﹣b+c>0;④4a﹣2b+c<0
其中正确的是( )