下列实验操作错误的是 请选择DCBA)y-D4@.W7_1d*|4_(q2`)P1X/i)G
A.4_(q2`)P1X/i)G
B.4_(q2`)P1X/i)G
C.4_(q2`)P1X/i)G
D.4_(q2`)P1X/i)G