A:
B:
C:
D:
郭沫若说:“政启开元,治宏贞观”,所称的是( )
被减数减少2.4,减数增加2.4,差不变。( )
10+6=____
17-5=____
16+3=____
13+2=____
16-3=____
— _____
— It's an apartment building.