题目

计算（1）    （2） 答案：（1）（2） 【分析】 （1）根据二次根式的加减运算法则即可求解；   （2）根据二次根式的混合运算法则即可求解． 【详解】 （1）   = = （2） = = = =． 【点睛】 此题主要考查二次根式的混合运算，解题的关键是熟知二次根式的运算法则．12．假定你是李华，你收到了你的美国朋友Peter寄来的最新英文小说．请给他回信，告诉他礼物已收到，并回赠他一件礼物以及说明礼物的意义．注意：1．词数100左右；          2．可以适当增加细节，以使行文连贯．Dear Peter，I'm glad to receive the latest English novel I can't thank you enough for such a lovely gift as Ihave been expecting for a long time．This novel gives me some insights into American society anddaily life．I know you are interested in Chinese festivals．Therefore，I have chosen an album of papercutting for you．Paper cutting is a unique form of Chinesecultural relics，which is often used as adecoration at festivals and on special occasions such as weddings for a joyous atmosphere I hope it will bring you happiness and good luck as it often does in China．Best wishes!I'm expecting you to come to China and experience the rich culture m person．Yours，Li Hua．