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听力材料13.W:What's this?(C)听下面一段对话，完成23至24小题。M:It's a red bag.And a book is in it.(B)23.What color is Jack's jacket?听14.M:My pencil is...

当f(x)=t1=一2时，方程有两个解，当f(x)=t2=0时，方程有两个解，所以方程f[f(x)门=0有4个不同的实数根，故C正确；对于D:当m=0时，方程f(x)十f(一x)=0的根为f(x)=...

BLost:ound:(B)56.Which can be put in▲？阅My name is Kelly Miller.I can'found a red schoolbag in the libraryA.she doesn't want to be friends with Sonal...

21.(本小题满分12分)解：(1)法一：当n=1时，S+S=5,即4，+2a=5,由4=1，得4=3，由S+S,=2m+2n+1,得S+S=2n-l1/+2n-)+1(n≥2)，两式相减得：a+a,=4nn≥2).又4+4=4，满足...

语篇填空导读：成都金沙遗址太阳神鸟简介。61.visitors考查名词的数到成都的游客数量是模糊的，此处应视为复数，符合常理。62.surrounding考查分词做定语根据句...

W:Are you going out tonight?M:No.Are you inviting me somewhere?W:Oh,no,I've actually spent all day trying to write a history essay and Istill haven't...

Chiang Rai is absolutely relaxed.Like Khao Lak,this is a great place to sit back and enjoy thescenery21.Sukhothai is most likely intended forA.Mountai...

高二英语参考答案听力答案：1-5 CCABA6-10 BCAAB11-15 BAACB16-20 CACCB听力原文Text 1W:Dick,if you can finish your homework before 6:00,I will take you to...

chemicals可知，游隼和秃鹰是两种几乎被有毒化学物毁灭的鸟类。48.D。根据an ad in the newspaper for volunteers和It takes Vallieres a while to walk the mil...

house event,and plenty of our staff will be there to answer questions.Our homes tend to sellquickly,so be prepared to pay a deposit if you want to buy...