①乙商品的需求量减少  
②乙商品的需求量增加

③丙商品的需求量减少    
④丙商品的需求量增加

设k＞0，函数f（x）=$\frac{1}{2}{x}^2$+x+kln|x﹣1|．

（1）讨论函数f（x）的单调性；

（2）当函数f（x）有两个极值点，且0＜θ＜π时，证明：（2k﹣1）sinθ+（1﹣k）sin（1﹣k）θ＞0．

一共有6节，每节有20个座位，来了115名乘客，座位够吗？

    Kate's father took her to the hospital to see her one-day-old baby brother. They drove there straight from school. Kate had never been inside a hospital before.  ①This was a new experience for her.

    At the gate there was a large sign listing all the departments of the hospital, with arrows (箭头) showing how to find them. When Kate saw the A&E department(急救室), she asked,“What do those letters stand for?”“Accident and emergency,” replied her father,

②“Last spring, I took our sister there because she fell off her bike,”

川气东送（下图）被列为继三峡工程、西气东输、青藏铁路、南水北调之后的中国第五大工程，该工程西起四川普光气田，东至上海市。表1为我国能源消费结构(%)表。据此回答题。