A:a∥b,b⊂α,则a∥α
B:a⊂α,b⊂β,α∥β,则a∥b
C:a⊂α,b⊂α,α∥β,b∥β,则α∥β
D:α∥β,a⊂α,则a∥β
(____)A. There is a school in my village.
(____)B. There is a river on the mountain.
(____)C. There're many animals in the forest.
(____)D. There is a tree behind the building.
(____)E. There is a lake near the house.
— Not at all. I'd be happy to.
1930年,鄂豫皖革命根据地英山县水稻单位面积产量增加二三成,有的甚至达到五成,出现“赤色区米价一元一斗,白色区一元只能买四五升”的情况。这主要是因为根据地( )