The TV is too loud. Could you please ________?
A:turn it on
B:turn it up
C:turn it down
D:turn down it
9n÷3=1.8
n=____
鞍山钢铁公司三大工厂、长春第一汽车制造厂、沈阳第一机床厂和飞机制造厂的建成投产,表明