使分式$\frac{x^2-5x-6}{x+1}$的值等于零的x是（　　）

   “Cool”is a word with many meanings．Its old meaning is used to express a temperature that is a little bit cold．As the world has changed，the word has had many different meanings． 
   “Cool”can be used to express feelings of interest in almost anything．
   When you see a famous car in the street，maybe you will say，“It's cool．”You may think，“He's so cool，”when you see your favourite footballer． 
   We all maximize（扩大） the meaning of“cool”．You can use it instead of many words such as “new” or “surprising”．Here's an interesting story we can use to show the way the word is used．A teacher asked her students to write about the waterfall（瀑布）they had visited．On one student's paper was Just the one sentence，“It's so cool．Maybe he thought it was the best way to show what he saw and felt． 
   But the story also shows a scarcity（缺乏）of words．Without “cool”，some people have no words to show the same meaning．So it is quite important to keep some credibility（可信性）．Can you think of many other words that make your life as colourful as the word “cool”？ I can．And I think they are also very cool．

1937年8月上海等地大的民营工厂在国民政府的组织下开始内迁，多数厂家内迁地点集中在四川、湖南、广西、云南等省，个別厂家在共产党的帮助下迁到了陕甘宁边区，这反映了(　　)

如图所示，均匀绕制的螺线管水平放置，在其正中心的上方附近用绝缘绳水平吊起通电直导线A，A与螺线管垂直，A导线中的电流方向垂直纸面向里，开关S闭合，A受到通电螺线管磁场的作用力的方向是(　　)