我国年降水量分布的总趋势是( )
A:从南向北逐渐减少
B:从东部沿海向西部地区递减
C:从东向西逐渐减少
D:从东南沿海向西北内陆递减
—Excuse me, Mum. When can we have dinner? —Not until it in half an hour.
4.5÷3.6 ____:____