[单项选择]在pH8.5~11溶液中,有氰化钾存在的条件下,能与双硫腙生成红色络合物的金属是() A. 锌 B. 铅 C. 镉 D. 汞 E. 锑
参考答案:B
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第1题: [多项选择]Which two statements are correct regarding MPLS LSP establishment methods?() (Choose two.) A. LDP uses Down Stream On Demand. B. RSVP uses Down Stream On Demand. C. LDP uses Down Stream Unsolicited. D. RSVP uses Down Stream Unsolicited. 参考答案:B,C