判斷句子的主干屬于哪一種結(jié)構(gòu) A.(S+V)B.(S+V+P)C.(S+V+O.)D.(S+V+O+O.C)E.(S+V+I O+DO) In 2012,Earthwatch Institute,a global nonprofit which teams volunteers with scientists to conduct important environmental research,launched a program based in the Wolong National Nature Reserve.
3.International tourism has brought in a phase where the opportunities of making quick profits from exploiting too much of what was regarded as freely available natural resources dazzled the eyes of government and businessmen,as well as many local residents. What is the sentence pattern?( ?。?/h2>