现代工伤保险的三大支柱是：（）
A、工伤解释
B、工伤预防
C、工伤鉴定
D、工伤救治与补偿
E、工伤康复
参考答案：B, D, E
一个圆的直径和周长．______．
.____me that you choose,so long as you finish the job on time.
A．It isn’t a matter to me what
B．What doesn’t matter is that
C．It doesn’t matter to me which
D．No matter which
