A . (C5~C7)/(C1一C4)和(C5~C7)/(C3~C4)B . (C1~C4)/(C1一C5和(C5~C7)/(C1~C5)C . C1-C4的总含量和i-C4/n-CD . C1~C4的总含量和(C2~C6)/(C1~C4)
答案: <查看本题扣1积分>
查看答案
答案不对?请尝试站内搜索