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spec: ( Note also that for threshold gates you are going to have to think about what version of DeMorgan you are going to need . Based on the concept of our international Reality Tours , Exploring California brings home the idea of interactive , issue-oriented travel . Although many of my constituents are beginning to see the benefits of video competition , the construction of new cable systems is a time-consuming and capital intensive undertaking . Enforcement will also be a problem for several reasons . Robeson later complained '' the same money interests that block every effort to help Spain , control the Motion Picture industry , and so refuse to allow such a story . This system is a cost-effective and environmentally friendly method of treating sewage through small treatment works . For teaching and research , the choice of organisms and test systems is a critical and often frustrating task . Wet-pipe sprinkler systems are a reliable and safe extinguishing method and are relatively easy to maintain .