在显微镜的使用中,下列操作与结果不相符的是( )
A:转动转换器﹣﹣更换物镜
B:转动粗准焦螺旋﹣﹣较大幅度升降镜筒
C:转动凹面镜﹣﹣调节视野亮度
D:向左上方移动装片﹣﹣物像向左上方移动
— Angela, I think your explanation can hardly satisfy our customers.
— I'm sorry, but I will explain it to them more clearly.
He has ____ ____ ____ ____ London.
计算: 4 +(﹣2)0=____.