在$△ABC$中，内角$A,B,C$所对的边分别为$a,b,c$，已知$△ABC$的面积为$3\sqrt{15}$$b-c=2,\cos A=-\frac{1}{4}$,则$a$的值为____ 。

党的十八大以来，党中央出台或修订的党内法规达50多部，坚持对腐败零容忍。从“打老虎”“拍苍蝇”，到国际追逃追赃，再到织密、扎紧制度铁笼，腐败存量正逐渐减少，“不敢腐、不能腐、不想腐”的氛围正逐步形成。这表明（    ）

①颁布《拿破仑法典》

②建立法兰西第一帝国

③拿破仑多次打败反法同盟

④建立法兰西第一共和国

(B)

    Thanksgiving Day is on the fourth Thursday of November in the U.S. and on the second Monday in October in Canada.

    For many Americans it is the most important (重要的) holiday apart from (除了) Christmas. Schools, offices and most businesses (商业) close for Thanksgiving, and many people make the whole (整个的) weekend a holiday.

    Today people celebrate Thanksgiving to remember the early days. The most important of the celebration is a traditional (传统的) dinner with foods that come from North America. The meal included (包括) turkey (火鸡), sweet potatoes and so on.

    On Thanksgiving there are special (特别的) TV shows and sports games. Thanksgiving is the beginning of Christmas period, and the next day many people go out to shop for Christmas gifts.

已知y与x+1成正比例关系，当x=2时，y=1，求：当x=﹣3时y的值．