已知函数f（x）=lnx﹣ax²﹣bx（a，b∈R），g（x）= $\frac{2x-2}{x+1}$ ﹣lnx．

根据短文内容，选择正确答案。
B
    Nick is my pen pal. He is 12 years old. He is from Canada. He lives in Ottawa. He speaks English and French. His favorite subject is science. He likes Chinese, too. And he says he can speak a little Chinese, but he can't write in Chinese.
    Nick likes sports, too. He likes swimming best. He goes swimming on weekends with his father. He says he can swim very well. He doesn't like physics. He thinks it's too difficult.
    Nick has a big family. There are nine people in his family, his grandpa, grandma, father, mother and his brothers and sisters. He has two brothers and two sisters. They are Bob, Tim, Jane and Susan. They are happy!

直线 $\sqrt{3}x+3y+a=0$ 的倾斜角为（   ）

英国国王和王室世代继承，从历史上看，他们原来是(   )

下图1和图2为某食物网示意图，各营养级之间的能量传递效率均为a，假如某一物种摄食两种及以上种生物时，其来自各种生物的能量所占比例相同，已知图1和图2中物种E的体重均分别增加1kg，需要消耗图1和图2中的物种A分别为X₁kg和X₂kg，则X₁和X₂的大小关系为