—Is Miss Long always strict_____you?
—Yes, she is. But I think it is good for us.
A:with
B:in
C:of
D:about
下列计算正确的是( )
小刚在做“探究凸透镜成像”实验,所用凸透镜的焦距为10cm且位置固定.
据史料记载,黄河流域曾有象、水牛和竹子等,由此推断当时气候状况可能是