A:make a use
B:make a decisio
C:make a promise
D:make predictio
如图甲所示电路中,R0为定值电阻,R1为滑动变阻器.图乙是该滑动变阻器消耗的电功率与电流关系的图象.则该滑动变阻器的最大值是____ Ω,电源电压是____ V.
观察下图,从图中的信息可以归纳得出( )
The doctor advised her to eat more bean products________meat which might be harmful to her heart.
2015年是羊年.羊是最早饲养的动物,与人类的关系非常密切.