解方程 x²+2x+1=4；

    Hi, friends!My name is Jason．I am 11 years old and I live in Chicago in the USA．There are many holidays every year,and，my favorite one is Thanksgiving(感恩节)．It is a family holiday．

    Thanksgiving comes on the fourth Thursday of November every year．There is no school on Thanksgiving Day．That's great!My family gets together on Thanksgiving Day．My brother will drive home from New York．We always have a big dinner．My mom makes a lot of delicious food．My sister always helps her in the kitchen．We have roast turkey,sweet potatoes,pumpkinpie(烤火鸡，红薯，南瓜派)and so on．Turkey is a must in my family．Before dinner we give thanks to everything

wehave．

    I love this holiday very much．It teaches me to be thankful in life．My favorite thing about the holiday is being with my family and having a great time with them．That is a very important thing of the holiday．

根据材料内容选择最佳答案。

在下列哪种环境中，霉菌最容易生长？（    ）

下列有关秦岭﹣淮河一线地理意义的叙述，错误的是（　　）

1968年,尼克松还是总统候选人的时候就说:“我们必须不忘掉中国。我们必须不断寻求机会和她谈谈。”他第一次“和她谈谈”的文献成果是（    ）