【填空题】
These vegetables can be cooked ().<br> 这些蔬菜可以用几种不同的方法烹调。
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A、A. difference, projection, join B、B. selection, projection, join C、C. selection, intersection, join D、D. intersection, projection, join E、E. difference, projection, product
A、NAC can authenticate using 802.1X and IBNS cannot B、NAC can ensure only compliant machines connect and IBNS cannot C、NAC can ensure access to the correct network resources and IBNS cannot D、NAC can manage user mobility and reduce overhead costs and IBNS cannot