若相似△ABC与△DEF的相似比为1 :3,则△ABC与△DEF的面积比为( )
A:1 :3
B:1 :9
C:3 :1
D:1 :
北宋僧人契嵩说:儒教“大有为”而“治世”,佛教“大无为”而“治心”,二者皆“圣人之教也,其所出虽不同,而同归于治”。这反映了( )
A month had passed, but the government didn't find the________of the mine accident.