万用表使用前应检查指针是否指在()位。
A.零
B.刻度1
C.刻度10
D.刻度15
参考答案:A
I’m going to the supermarket this afternoon. Do you have anything____?
A.bought
B.to be bought
C.for buying
D.to buy
抛物线y=-2(x-6)2+9的顶点坐标是( )
A.(6,9)
B.(-6,9)
C.(6,-9)
D.(-6,-9)