解决水资源时间分配不均的主要办法是( )
A:节约用水
B:防治水污染
C:兴修水库
D:跨流域调水
“I don't think it's my ________ that the window suddenly broke. I just opened it, that's all,” said the boy in tears.
蚕豆种子的可食用部分主要是( )