下列实验基本操作正确的是请选择ABCD,]:Z-\9G2y0D5e9H)g5f)k0d3A:X;k8d
A．5f)k0d3A:X;k8d
B．5f)k0d3A:X;k8d
C．5f)k0d3A:X;k8d
D．5f)k0d3A:X;k8d
5f)k0d3A:X;k8d
5f)k0d3A:X;k8d
5f)k0d3A:X;k8d
5f)k0d3A:X;k8d