若函数f（x）是定义在R上的偶函数，在（﹣∞，0上是减函数，且f（﹣2）=0，则使得f（x）＜0的x的取值范围____．

化简$\frac{x^2-y^2}{x-y}$的结果（　　）

短文改错。
短文中共有10处语言错误，每行中最多两处错误。错误涉及一个单词的增加、删除或修改。
增加：在此处加一个漏字符号(∧)，并在其下面写出增加的词;
删除：把多余的词用斜线(＼)划掉;
修改：在错的词下划一横线，并在其下面写出修改后的词。
注意：1）.每处错误及其修改均仅限一词；
2）.只允许修改10处，多者(从十一处起)不计分。
    I am angry about the behavior of dishonest in exams. This doesn't mean I've never cheated. I once write the answers on my hand for a history test, but unluckily caught by my teacher. Because she was one of my most favorites, there were no words to describe what sorry I felt at that time. I thought cheat would help me keep my straight A. Little I know that I was hurting not only me but also my teacher. From this lesson I know our teachers want their students to succeed by learning with their own and do the best they can, not by cheating.

“中国加入世贸就像一个昏庸短见的守财奴，把自己的清白闺女嫁给了土匪。结果土匪根本就没有把岳父当人看……还要赔上23000亿美元的嫁妆。”对此认识正确的是（    ）

    Restaurant  owners  have to know how  ____  ( make) food. They also have to know how to make money. Here are some things they ____ (learn) from scientific studies. The color red ____ (make) people hungry. Red also makes customers____ (eat) fast food restaurants, therefore, have red furniture or walls. Soft colors like pink and light blue make people____  ( relax), so they spend more time____ (eat) their meals. Soft lighting____  ( make )people look good, but it makes food look bad. Loud music  makes people want____ (  leave). Hard seats also____ ( make ) customers want to eat quickly and leave. Many restaurants, especially fast food restaurants, use this knowledge ____ (make) customers eat faster.