接地体的埋设深度，要求不应小于（）。
A、0.4米
B、0.5米
C、0.6米
D、1.0米
参考答案：C
She ________an old friend of hers yesterday while she was shopping at the department store.(2011·天津)
A．turned down
B．dealt with
C．took after
D．came across
怎样正确理解报道思想的作用及它的可变动性？
